Affidavit of Loss for Lost SIM Card Requirements

Introduction

An Affidavit of Loss for a lost SIM card is a sworn written statement used in the Philippines to formally declare that a subscriber’s SIM card was lost, misplaced, stolen, damaged beyond recovery, or otherwise no longer in the subscriber’s possession. It is commonly required when the subscriber wants to request SIM replacement, recover the same mobile number, report the loss to the telecommunications provider, prevent unauthorized use, or support related transactions involving mobile wallets, online banking, government accounts, or identity verification.

A SIM card is not just a piece of plastic. It may be connected to calls, text messages, mobile data, online banking, one-time passwords, e-wallets, social media accounts, email recovery, government portals, work accounts, and personal identity verification. Because of this, losing a SIM card may create legal, financial, and cybersecurity risks.

In the Philippine context, the affidavit of loss serves several functions:

  1. it documents the fact and circumstances of loss;
  2. it identifies the subscriber and the lost SIM number;
  3. it supports a request for SIM replacement;
  4. it helps protect the subscriber from liability for unauthorized use after loss;
  5. it assists the telco in verifying the subscriber’s claim;
  6. it may support reports involving fraud, theft, scams, or identity misuse;
  7. it may be required by banks, e-wallet providers, employers, or government agencies; and
  8. it creates a sworn record that may be used in legal or administrative proceedings.

The central rule is this: an affidavit of loss does not automatically restore a lost SIM card or mobile number. It is a supporting legal document. The subscriber must still comply with the mobile network operator’s verification, SIM registration, replacement, and identity requirements.

What Is an Affidavit of Loss?

An affidavit of loss is a notarized sworn statement made by a person who lost an item or document. The person signing the affidavit is called the affiant.

For a lost SIM card, the affidavit usually states:

  1. the affiant’s full name;
  2. the affiant’s address and identifying details;
  3. the mobile number of the lost SIM;
  4. the network provider;
  5. when and where the SIM was lost;
  6. how the loss was discovered;
  7. efforts made to locate it;
  8. a statement that the SIM has not been recovered;
  9. a statement requesting replacement or deactivation, if applicable;
  10. a statement that the loss was not due to fraud or illegal transfer;
  11. a commitment to report recovery or misuse; and
  12. acknowledgment that the statement is made under oath.

Because it is notarized, the affidavit becomes a public document and carries legal consequences. False statements may expose the affiant to liability.

Why an Affidavit of Loss Is Needed for a Lost SIM Card

A telecommunications company may require an affidavit of loss before replacing a SIM card because a SIM replacement can give control over a mobile number. Whoever controls the SIM may receive OTPs, account recovery codes, bank alerts, e-wallet confirmations, and other sensitive communications.

The affidavit helps the telco manage risks involving:

  1. impersonation;
  2. SIM swap fraud;
  3. unauthorized account access;
  4. identity theft;
  5. fraudulent mobile wallet withdrawals;
  6. unauthorized banking transactions;
  7. criminal use of lost or stolen numbers;
  8. disputes between claimed owners;
  9. corporate-issued SIMs;
  10. prepaid SIMs with weak historical documentation;
  11. postpaid account ownership issues;
  12. inactive or expired SIMs;
  13. unregistered or improperly registered SIMs; and
  14. attempts to recover a number by someone who is not the rightful subscriber.

A telco must be careful because wrongful SIM replacement can cause serious harm. For that reason, an affidavit is usually only one of several requirements.

Is an Affidavit of Loss Always Required?

Not always. Requirements vary depending on the telecommunications provider, type of account, status of SIM registration, whether the SIM is prepaid or postpaid, whether the SIM was stolen, and whether the subscriber can pass identity verification.

An affidavit of loss is commonly required or requested when:

  1. the physical SIM card is lost;
  2. the phone containing the SIM was stolen;
  3. the subscriber wants the same number replaced;
  4. the subscriber cannot present the old SIM;
  5. the SIM is linked to important accounts;
  6. there is a risk of unauthorized use;
  7. the telco store requires documentary proof of loss;
  8. the SIM is under a corporate account;
  9. the account involves postpaid billing;
  10. the subscriber wants deactivation of the lost SIM;
  11. the number is connected to mobile wallet or banking issues; or
  12. the loss may be involved in fraud or unauthorized transactions.

Some telco branches may process replacement with valid ID and account verification alone. Others may require a notarized affidavit, especially when circumstances are suspicious or documents are incomplete.

Legal Importance of a Lost SIM Card

Losing a SIM card can have consequences beyond inconvenience.

The lost SIM may be used for:

  1. receiving OTPs;
  2. password reset requests;
  3. mobile wallet transactions;
  4. bank transfer confirmations;
  5. account recovery;
  6. phishing or scam messages;
  7. impersonation;
  8. unauthorized calls;
  9. harassment;
  10. illegal online transactions;
  11. SIM registration misuse;
  12. fraudulent loan applications;
  13. social media takeover;
  14. work account access;
  15. government portal access; and
  16. identity verification abuse.

Because the Philippines has a SIM registration system, the SIM is associated with a registered subscriber. If the SIM is used after loss, the subscriber may need evidence showing that the SIM was no longer in their possession when the misuse occurred. An affidavit of loss may help establish that timeline.

Affidavit of Loss vs. Police Report

An affidavit of loss and a police report are different.

Affidavit of Loss

An affidavit of loss is a sworn statement made by the subscriber before a notary public. It is usually enough for ordinary loss or replacement requests if the telco accepts it.

Police Report

A police report is an official report made to law enforcement. It may be needed when the SIM was stolen, used for fraud, connected to a stolen phone, or involved in unauthorized transactions.

If the phone or SIM was stolen, especially through snatching, robbery, burglary, or cyber-related fraud, a police report may be advisable. If unauthorized bank or e-wallet transactions occurred, the subscriber should usually make both a police report and reports to the service providers involved.

For simple misplacement, an affidavit of loss may be enough. For theft or fraud, a police report strengthens the record.

Affidavit of Loss vs. Notarized Undertaking

Some telcos may require not only an affidavit of loss but also an undertaking or indemnity form.

An undertaking may state that the subscriber:

  1. confirms ownership or lawful use of the mobile number;
  2. assumes responsibility for the replacement request;
  3. agrees to indemnify the telco for false claims;
  4. certifies that the SIM was lost and not sold or transferred;
  5. accepts deactivation of the lost SIM;
  6. agrees that the old SIM cannot be used once replaced;
  7. confirms compliance with SIM registration;
  8. consents to verification; and
  9. acknowledges liability for false information.

The affidavit states the facts of loss. The undertaking protects the telco and defines the subscriber’s responsibility.

Common Requirements for SIM Replacement After Loss

Requirements vary by provider, but common requirements include:

  1. notarized affidavit of loss;
  2. one or more valid government-issued IDs;
  3. proof of SIM registration;
  4. proof of ownership or control of the number;
  5. recent load transaction or billing statement;
  6. postpaid account number, if postpaid;
  7. SIM bed or cardholder, if available;
  8. previous official receipt or proof of purchase;
  9. phone number and network details;
  10. personal appearance at telco store;
  11. biometric or selfie verification, if required;
  12. answer to verification questions;
  13. police report, if stolen or fraud-related;
  14. authorization letter or special power of attorney, if representative is allowed;
  15. corporate authorization, if company-owned SIM;
  16. death certificate and estate or family documents, if subscriber is deceased;
  17. guardianship or parental documents for minors;
  18. replacement fee;
  19. deactivation request for the lost SIM; and
  20. updated SIM registration details.

A telco may deny replacement if the applicant cannot prove that they are the rightful registered subscriber.

Valid IDs Commonly Used

A subscriber may need to present a valid ID. Acceptability depends on the telco and current rules.

Commonly accepted IDs may include:

  1. Philippine passport;
  2. driver’s license;
  3. national ID;
  4. Unified Multi-Purpose ID;
  5. Social Security System ID;
  6. Government Service Insurance System ID;
  7. Professional Regulation Commission ID;
  8. voter’s ID or voter certification;
  9. postal ID;
  10. PhilHealth ID, if accepted;
  11. senior citizen ID;
  12. person with disability ID;
  13. Overseas Workers Welfare Administration ID;
  14. seafarer’s book;
  15. alien certificate of registration, for foreign nationals;
  16. school ID, where allowed for students;
  17. company ID, where accepted as secondary proof; and
  18. other IDs accepted by the provider.

The ID name must match the subscriber’s SIM registration or account details. If there is a name discrepancy, additional documents may be needed.

Proof of Ownership or Lawful Use of the SIM

For prepaid SIMs, proof of ownership can be challenging because prepaid accounts may not have billing statements. Telcos may ask verification questions to establish control over the number.

Possible proof may include:

  1. SIM registration confirmation;
  2. SIM bed or original SIM cardholder;
  3. prepaid load receipts;
  4. recent reload history;
  5. recent call or text patterns;
  6. mobile wallet link under the same name;
  7. screenshots of account settings showing the number;
  8. telco app account;
  9. device IMEI previously used with the SIM;
  10. valid ID matching registration;
  11. previous replacement records;
  12. PUK code or PIN details from SIM packaging;
  13. proof that the number is used for bank or government accounts;
  14. notarized affidavit; and
  15. answers to account verification questions.

For postpaid SIMs, the subscriber can usually present account number, billing statement, valid ID, and account verification details.

SIM Registration and Lost SIM Replacement

Because SIM registration is mandatory in the Philippines, lost SIM replacement is closely tied to the registered subscriber’s identity.

A telco may check whether:

  1. the SIM was registered;
  2. the applicant is the registered subscriber;
  3. the registration details match the ID presented;
  4. the SIM is active or inactive;
  5. the number has been deactivated;
  6. the SIM was reported stolen or lost;
  7. the number is under dispute;
  8. the SIM is under an individual or corporate account;
  9. the subscriber has multiple SIMs; and
  10. the replacement request is suspicious.

If the SIM was never properly registered or was registered under another person’s name, replacement may be difficult or denied.

Prepaid SIM Replacement

Prepaid SIM replacement can be more complicated than postpaid replacement because prepaid users may not have formal account documents.

For prepaid SIMs, the subscriber should prepare:

  1. valid ID;
  2. affidavit of loss;
  3. SIM registration proof;
  4. SIM bed, if available;
  5. proof of recent load;
  6. proof of use of the number;
  7. telco app account, if any;
  8. mobile wallet account linked to the number;
  9. phone where the SIM was used, if available;
  10. police report if stolen; and
  11. replacement fee.

The telco may ask questions about recent transactions, last reload, frequently contacted numbers, or services linked to the SIM.

Postpaid SIM Replacement

Postpaid replacement is usually tied to an account.

Requirements may include:

  1. valid ID of account holder;
  2. affidavit of loss;
  3. account number;
  4. billing statement;
  5. personal appearance;
  6. payment of outstanding balance, if required;
  7. authorization documents for corporate accounts;
  8. replacement fee;
  9. police report if stolen; and
  10. account verification.

If the account has unpaid bills, the telco may require settlement or compliance with postpaid account rules before replacement.

Corporate or Company-Issued SIM

If the lost SIM is company-issued, the employee may not be the legal account holder. The subscriber may be the employer, corporation, government agency, or organization.

Requirements may include:

  1. affidavit of loss by the user or accountable employee;
  2. company authorization letter;
  3. secretary’s certificate or board resolution, if required;
  4. valid ID of authorized representative;
  5. company ID of employee;
  6. incident report;
  7. police report if stolen;
  8. account number;
  9. corporate billing statement;
  10. request on company letterhead;
  11. replacement fee or purchase order;
  12. authority from the account administrator; and
  13. compliance with company asset accountability rules.

An employee should report the loss to the employer immediately because the SIM may be tied to work accounts and official communications.

Government-Issued SIM

If the SIM is issued by a government office to an employee or official, additional internal procedures may apply.

The employee may need:

  1. incident report;
  2. affidavit of loss;
  3. report to property or supply office;
  4. report to IT or communications unit;
  5. police report if stolen;
  6. supervisor endorsement;
  7. agency authorization for replacement;
  8. government ID;
  9. telco account details;
  10. data breach report if sensitive accounts were affected;
  11. deactivation request; and
  12. clearance from accountable property custodian.

If the lost SIM was used for official accounts, immediate deactivation is important.

SIM Linked to Mobile Wallets

A lost SIM is especially risky if connected to a mobile wallet.

The subscriber should immediately:

  1. report the SIM loss to the telco;
  2. request temporary deactivation or blocking;
  3. report to the mobile wallet provider;
  4. freeze or secure the wallet account;
  5. change wallet PIN;
  6. unlink devices if possible;
  7. change email password;
  8. check transaction history;
  9. report unauthorized transactions;
  10. preserve screenshots and messages;
  11. file a police report if fraud occurred;
  12. submit affidavit of loss if required;
  13. request SIM replacement quickly;
  14. update account recovery settings; and
  15. avoid giving OTPs to anyone.

An affidavit of loss may be needed by both the telco and the e-wallet provider.

SIM Linked to Online Banking

If a lost SIM receives bank OTPs, immediate action is critical.

The subscriber should:

  1. call the bank hotline;
  2. temporarily disable online banking if necessary;
  3. change passwords;
  4. change registered mobile number if urgent;
  5. monitor transactions;
  6. report unauthorized activity;
  7. block cards if needed;
  8. preserve evidence;
  9. request bank incident reference number;
  10. report SIM loss to telco;
  11. file affidavit of loss;
  12. file police report if theft or fraud occurred; and
  13. follow bank dispute procedures.

A SIM replacement may restore the mobile number, but if someone accessed the SIM before deactivation, financial accounts may already be at risk.

SIM Linked to Social Media and Email Accounts

Many platforms use mobile numbers for account recovery. A lost SIM may allow unauthorized password resets if the person possessing it can receive verification codes.

The subscriber should:

  1. change passwords immediately;
  2. remove the lost number temporarily if possible;
  3. add authenticator app or backup codes;
  4. update recovery email;
  5. log out other sessions;
  6. check login activity;
  7. secure e-wallets and bank accounts first;
  8. report suspicious activity;
  9. request SIM blocking; and
  10. replace the SIM.

The affidavit of loss can support recovery if accounts are compromised.

What to Do Immediately After Losing a SIM Card

Step 1: Try to Locate the SIM or Phone

Check bags, pockets, vehicle, home, workplace, and recent locations. Call the number from another phone.

Step 2: If Stolen, Prioritize Safety

If the SIM was inside a stolen phone, do not confront suspects. Report to police if appropriate.

Step 3: Contact the Telco

Report the SIM as lost and ask for temporary blocking or deactivation.

Step 4: Secure Financial Accounts

Call banks and mobile wallet providers if the number receives OTPs.

Step 5: Change Passwords

Secure email, social media, telco app, e-wallet, and banking credentials.

Step 6: Prepare Documents

Prepare valid ID, affidavit of loss, police report if needed, proof of ownership, and other requirements.

Step 7: Request SIM Replacement

Visit an authorized telco store or follow official replacement procedures.

Step 8: Monitor for Misuse

Watch for unauthorized transactions, scam messages, account recovery attempts, and reports from contacts.

Contents of an Affidavit of Loss for Lost SIM Card

A complete affidavit should generally contain:

  1. title of the document;
  2. full name of affiant;
  3. age or legal capacity;
  4. citizenship;
  5. civil status, if needed;
  6. residence address;
  7. valid ID details;
  8. statement that the affiant is the registered subscriber or lawful user;
  9. mobile number of the lost SIM;
  10. network provider;
  11. account type, if prepaid or postpaid;
  12. date and place of loss;
  13. circumstances of loss;
  14. date when the loss was discovered;
  15. efforts to locate the SIM;
  16. statement that it has not been recovered;
  17. statement that the affiant is requesting replacement or deactivation;
  18. statement that if recovered, the affiant will not use it or will surrender/report it;
  19. statement that the affidavit is executed for SIM replacement and other legal purposes;
  20. signature of affiant;
  21. jurat by notary public;
  22. notarial details; and
  23. competent evidence of identity.

Sample Affidavit of Loss for Lost SIM Card

Below is a general sample. It should be adjusted to fit the facts and the requirements of the telco or institution.

AFFIDAVIT OF LOSS

I, [Full Name], of legal age, Filipino, [civil status], and residing at [complete address], after being duly sworn in accordance with law, state:

  1. That I am the registered subscriber and lawful user of the mobile number [09XX-XXX-XXXX] issued by [network provider];

  2. That the said mobile number was assigned to a SIM card used by me for personal communications and related lawful transactions;

  3. That on or about [date], at approximately [time, if known], while I was at [place], I discovered that the said SIM card, or the mobile phone containing the said SIM card, was missing;

  4. That despite diligent efforts to locate and recover the said SIM card, including [briefly state efforts made], I have been unable to find or recover it;

  5. That the loss was not due to any sale, transfer, assignment, or voluntary surrender of the SIM card or mobile number to another person;

  6. That I am executing this Affidavit to attest to the loss of the said SIM card, to request the replacement and/or deactivation of the lost SIM card, and for whatever legal purpose this may serve;

  7. That should the lost SIM card be recovered, I undertake to report the same to the concerned telecommunications provider and to refrain from using it if a replacement SIM has already been issued.

IN WITNESS WHEREOF, I have signed this Affidavit this ___ day of __________ 20__ in [city/municipality], Philippines.

[Signature] [Full Name of Affiant]

SUBSCRIBED AND SWORN to before me this ___ day of __________ 20__ in [city/municipality], Philippines, affiant exhibiting to me competent evidence of identity: [ID type, ID number, date/place issued or validity].

Notary Public

If the SIM Was Stolen

If the SIM was stolen, the affidavit should state that the SIM or phone was stolen, if accurate.

It may include:

  1. date and time of theft;
  2. place of theft;
  3. circumstances, such as snatching, pickpocketing, robbery, burglary, or vehicle break-in;
  4. phone model and IMEI, if known;
  5. mobile number;
  6. network provider;
  7. police report details;
  8. statement that unauthorized use is not authorized by the subscriber;
  9. request for blocking or replacement; and
  10. statement that the incident was reported.

In theft cases, a police report is often advisable.

If Only the SIM Was Lost but the Phone Remains

If the phone remains but the SIM card is missing, the affidavit should explain how this happened.

Examples:

  1. the SIM tray was removed;
  2. the SIM was misplaced during phone repair;
  3. the SIM was removed during change of device;
  4. the SIM was lost while switching phones;
  5. the SIM was damaged and discarded accidentally;
  6. the SIM was separated from the phone while traveling; or
  7. the SIM holder was lost.

The affidavit should be truthful and specific.

If the Phone Containing the SIM Was Lost

If the phone containing the SIM was lost, the affidavit may identify the phone.

Include:

  1. phone brand and model;
  2. color;
  3. IMEI, if known;
  4. place and date of loss;
  5. mobile number;
  6. whether the phone had screen lock;
  7. whether the SIM was linked to e-wallet or banking;
  8. whether the phone was reported to police;
  9. request for SIM replacement; and
  10. request for deactivation of the lost SIM.

This can help if the phone is later used for unauthorized transactions.

If the SIM Was Damaged

Sometimes an affidavit of loss is requested even if the SIM is not physically lost but damaged beyond use.

For a damaged SIM, a telco may require:

  1. the damaged SIM card;
  2. valid ID;
  3. proof of ownership;
  4. SIM registration proof;
  5. replacement fee;
  6. affidavit, if the SIM is unreadable or partly missing; and
  7. account verification.

If the SIM is available but defective, an affidavit of loss may not be necessary. A request for replacement due to damaged SIM may be enough.

If the SIM Was Confiscated or Retained by Someone Else

If the SIM or phone was taken by another person, such as a former partner, employer, family member, repair shop, or unknown person, the affidavit should be carefully drafted.

Possible issues include:

  1. theft;
  2. unauthorized retention;
  3. employment property dispute;
  4. domestic dispute;
  5. corporate account ownership;
  6. device repair dispute;
  7. co-user dispute;
  8. mobile wallet access risk;
  9. account takeover;
  10. harassment; and
  11. privacy violation.

If another person may claim rights over the SIM, legal advice may be needed. A false claim of loss when the SIM is actually subject to a dispute can create problems.

Notarization Requirement

An affidavit of loss must be notarized to have its usual legal effect.

The notary public will require the affiant to:

  1. personally appear;
  2. present valid identification;
  3. confirm understanding of the affidavit;
  4. sign the affidavit voluntarily;
  5. swear to the truth of the statements; and
  6. pay the notarial fee.

A document signed but not notarized may be treated only as an unsworn statement, and the telco may reject it.

Personal Appearance Before Notary

The affiant should personally appear before the notary. Notarization without personal appearance is improper.

The notary must verify identity and confirm that the person signed voluntarily.

Using a pre-notarized affidavit, fake notarization, or someone else signing for the subscriber may create serious legal consequences.

Competent Evidence of Identity

For notarization, the affiant must present competent evidence of identity. This usually means an identification document with photograph and signature issued by an official agency or accepted under notarial rules.

The ID should match the name in the affidavit.

If the subscriber’s name on the SIM registration differs from the ID, additional documents may be needed, such as:

  1. marriage certificate;
  2. birth certificate;
  3. court order;
  4. affidavit of one and the same person;
  5. updated ID;
  6. passport;
  7. company certification; or
  8. other official proof.

Notarial Fees

Notarial fees vary by location and notary. Fees may depend on the number of pages, complexity, and whether the affidavit is drafted by the notary or prepared beforehand.

The subscriber should ensure the affidavit has proper notarial details, including:

  1. notary name;
  2. commission number;
  3. roll number;
  4. PTR number;
  5. IBP number, if applicable;
  6. notarial register number;
  7. date and place of notarization;
  8. seal; and
  9. signature.

A defective notarization may be rejected.

False Affidavit of Loss

A false affidavit of loss is dangerous.

Examples of false statements include:

  1. claiming the SIM was lost when it was sold;
  2. claiming to be the registered subscriber when not true;
  3. using another person’s number;
  4. hiding a dispute over ownership;
  5. falsely claiming theft to avoid liability;
  6. denying unauthorized use despite knowledge;
  7. misrepresenting identity;
  8. using fake ID;
  9. submitting forged documents;
  10. applying for replacement to take over someone else’s number; and
  11. concealing that the SIM was used for illegal acts.

Because the affidavit is sworn, false statements may expose the affiant to perjury, falsification-related issues, fraud allegations, civil liability, or denial of the replacement request.

SIM Swap Fraud Concerns

SIM replacement is vulnerable to SIM swap fraud. This occurs when a person obtains a replacement SIM for another person’s number and uses it to access accounts.

Telcos may scrutinize requests involving:

  1. high-value mobile wallet accounts;
  2. banking-linked numbers;
  3. recently changed registration details;
  4. mismatched IDs;
  5. suspicious affidavits;
  6. multiple replacement attempts;
  7. representatives instead of personal appearance;
  8. lost phone and immediate account takeover;
  9. foreign travel or remote requests;
  10. corporate accounts;
  11. numbers used for business; and
  12. recent social engineering reports.

A legitimate subscriber should expect verification. Strictness protects the subscriber as well as the telco.

Data Privacy Considerations

A SIM replacement request involves personal data, including:

  1. full name;
  2. address;
  3. mobile number;
  4. valid ID;
  5. signature;
  6. account details;
  7. SIM registration data;
  8. contact history or usage verification;
  9. billing information;
  10. mobile wallet linkage;
  11. incident details; and
  12. possibly police report information.

The subscriber should submit documents only to official telco stores, authorized channels, banks, e-wallet providers, or proper authorities.

Avoid sending affidavits, IDs, and SIM details to unofficial social media pages, fixers, or unknown agents.

Lost SIM Card and Unauthorized Transactions

If unauthorized transactions occurred after the SIM was lost, the affidavit of loss should be paired with immediate reports.

The subscriber should report to:

  1. telco;
  2. bank;
  3. mobile wallet provider;
  4. police or cybercrime unit, if fraud occurred;
  5. platform provider, if social media or email was accessed;
  6. employer, if work accounts were affected;
  7. government agency, if official accounts were compromised; and
  8. relevant customer support channels.

Evidence to preserve includes:

  1. transaction alerts;
  2. screenshots;
  3. SMS messages;
  4. email notices;
  5. call logs;
  6. bank statements;
  7. wallet transaction history;
  8. telco incident reference number;
  9. police report;
  10. affidavit of loss;
  11. CCTV or location records, if available;
  12. device IMEI;
  13. timeline of loss and reports; and
  14. names of persons contacted.

Timing matters. Report immediately.

Liability for Use of Lost SIM

If a lost SIM is used after loss, the subscriber may need to show that they no longer possessed or controlled it.

An affidavit of loss can help establish:

  1. when the SIM was lost;
  2. when the subscriber discovered the loss;
  3. when the subscriber reported it;
  4. what accounts were at risk;
  5. that any later use was unauthorized; and
  6. that the subscriber acted in good faith.

However, an affidavit alone may not automatically absolve liability. The subscriber’s promptness, account security, negligence, and the facts of the unauthorized use may still be examined.

Importance of Prompt Reporting

A subscriber should report the loss quickly.

Delay can create problems because:

  1. unauthorized users may access OTPs;
  2. fraudulent transactions may occur;
  3. scam messages may be sent from the number;
  4. banks may question delayed reporting;
  5. e-wallet providers may deny or limit disputes;
  6. telco records may show continued use;
  7. evidence may disappear;
  8. the number may be deactivated or recycled;
  9. replacement may become harder; and
  10. the subscriber may have difficulty proving misuse.

An affidavit should state the approximate time of discovery and subsequent actions truthfully.

Number Deactivation and Replacement

When replacing a lost SIM, the telco usually deactivates the old SIM and activates a new SIM with the same number.

Once replacement is completed:

  1. the lost SIM should stop working;
  2. the new SIM should receive calls and texts;
  3. mobile data services may resume;
  4. OTPs will go to the new SIM;
  5. some services may require reactivation;
  6. mobile wallet or banking access may be temporarily restricted;
  7. the subscriber may need to update SIM registration details;
  8. network activation may take some time; and
  9. the subscriber should test calls, texts, and data.

If the old SIM still works after replacement, the subscriber should report immediately.

Can Someone Else Replace the Lost SIM for the Subscriber?

Some telcos require personal appearance for SIM replacement, especially for lost SIMs. This is because identity verification is critical.

A representative may be allowed only under strict conditions.

Possible requirements for a representative include:

  1. special power of attorney;
  2. notarized authorization letter;
  3. valid ID of subscriber;
  4. valid ID of representative;
  5. affidavit of loss signed by subscriber;
  6. proof of ownership;
  7. account verification;
  8. corporate authorization, if corporate account;
  9. medical or travel reason for nonappearance; and
  10. telco approval.

For security reasons, telcos may still refuse replacement through a representative.

If the Subscriber Is Abroad

A Filipino abroad who lost a Philippine SIM may face difficulty because personal appearance at a Philippine telco store may be required.

Possible steps include:

  1. contact telco customer service;
  2. request temporary blocking;
  3. ask if overseas replacement is available;
  4. execute affidavit of loss before a Philippine consulate or local notary with authentication, if needed;
  5. authorize a representative in the Philippines through consularized SPA;
  6. provide valid Philippine ID or passport;
  7. provide proof of SIM ownership;
  8. secure linked bank and wallet accounts;
  9. change OTP number where possible; and
  10. request guidance from banks and e-wallet providers.

The exact process depends on the telco and account type.

If the Subscriber Is a Minor

If the SIM is registered to or used by a minor, the parent or guardian may need to assist.

Requirements may include:

  1. affidavit of loss by parent, guardian, or minor where appropriate;
  2. valid ID of parent or guardian;
  3. ID or birth certificate of minor;
  4. proof of relationship;
  5. SIM registration proof;
  6. authorization documents;
  7. school ID, if accepted;
  8. personal appearance of parent or guardian;
  9. police report if stolen; and
  10. telco-specific requirements.

Because minors may have limited legal capacity, the telco may require adult representation.

If the Subscriber Is Deceased

If a SIM belonged to a deceased person, replacement is not a simple affidavit of loss issue.

Possible concerns include:

  1. account closure;
  2. access to estate-related communications;
  3. mobile wallet balance;
  4. unpaid postpaid bills;
  5. business accounts;
  6. family disputes;
  7. privacy of the deceased;
  8. inheritance issues;
  9. recovery of digital accounts; and
  10. risk of unauthorized access.

The telco may require:

  1. death certificate;
  2. proof of relationship;
  3. estate documents;
  4. administrator or executor authority;
  5. valid IDs;
  6. affidavit;
  7. request for deactivation rather than replacement;
  8. court order, if disputed; and
  9. compliance with account policies.

Family members should not falsely execute an affidavit claiming to be the subscriber.

If the SIM Is Registered Under Another Person’s Name

If the SIM is used by one person but registered under another, replacement may be difficult.

Examples:

  1. parent registered the SIM but child uses it;
  2. employer registered the SIM but employee uses it;
  3. spouse registered the SIM but other spouse uses it;
  4. friend bought and registered SIM;
  5. informal transfer occurred;
  6. SIM was purchased pre-registration era but later registered by someone else;
  7. seller transferred a number without proper process; and
  8. person used a SIM registered under a deceased relative.

The telco will usually prioritize the registered subscriber. The user may need authorization from the registered subscriber or proper transfer of registration.

An affidavit of loss by the user may not be enough if the user is not the registered subscriber.

If the Lost SIM Was Used for Business

A business number may be tied to customers, suppliers, digital ads, payment channels, online stores, delivery apps, and business verification.

If a business SIM is lost, the owner should:

  1. report to telco immediately;
  2. secure business e-wallets and bank accounts;
  3. notify staff handling the number;
  4. monitor customer messages;
  5. prevent scammers from impersonating the business;
  6. post official advisory through verified channels if needed;
  7. replace the SIM quickly;
  8. update account recovery options;
  9. file affidavit of loss;
  10. file police report if stolen or misused;
  11. document any unauthorized customer messages; and
  12. review internal controls.

If the number is under a corporation, corporate authority documents may be required.

If the Lost SIM Was Used for Two-Factor Authentication

A lost SIM used for two-factor authentication can lock the subscriber out of important accounts.

The subscriber should:

  1. use backup codes if available;
  2. switch to authenticator app where possible;
  3. change recovery number;
  4. update email recovery;
  5. contact platform support;
  6. provide affidavit of loss if required;
  7. secure telco replacement;
  8. check for unauthorized logins;
  9. revoke active sessions; and
  10. avoid relying only on SMS OTP in the future.

After recovery, use stronger account protection where available.

If the Lost SIM Was Later Found

If the lost SIM is found before replacement, the subscriber may not need replacement. The subscriber should still check for unauthorized use.

If the SIM is found after replacement, the old SIM should no longer be usable. The subscriber should not attempt to use both.

If the affidavit states that the subscriber will report recovery, the subscriber should inform the telco if appropriate, especially if there was a theft or fraud report.

If the Lost SIM Was Already Deactivated

A SIM may be deactivated because of non-use, failure to register, expiration, account closure, unpaid postpaid bills, or prior replacement.

If the SIM is already deactivated, replacement may depend on whether the number is still recoverable.

An affidavit of loss may not revive a number that has been permanently deactivated, recycled, or assigned to another subscriber.

The subscriber should ask the telco whether the number can still be recovered.

If the Lost SIM Number Was Recycled

Mobile numbers may eventually be recycled after deactivation, subject to telco policies and regulations.

If the number has been reassigned to another person, the former user may not be able to recover it.

This is why prompt reporting and replacement are important.

If a recycled number still receives messages intended for the former user, the former user should update bank, wallet, email, and account recovery information immediately.

Affidavit of Loss for SIM Card and Phone Insurance

If the lost SIM was inside an insured phone or company-issued device, the affidavit may support insurance or asset accountability claims.

Additional documents may include:

  1. police report;
  2. purchase receipt;
  3. device IMEI;
  4. insurance policy;
  5. incident report;
  6. proof of ownership;
  7. blocking request;
  8. employer certification;
  9. repair or replacement estimate;
  10. claim form; and
  11. affidavit of loss for the device and SIM.

The affidavit should accurately describe both the phone and SIM if both were lost.

Affidavit of Loss for SIM Card in Employment Context

An employee may need an affidavit if the SIM is used for work, even if the SIM is personally owned.

Employment-related issues include:

  1. company accounts linked to the number;
  2. official OTPs;
  3. access to confidential files;
  4. client communications;
  5. data breach risk;
  6. device accountability;
  7. work messaging apps;
  8. remote access authentication;
  9. reimbursement for replacement;
  10. disciplinary issues if loss was due to negligence; and
  11. need for IT security reset.

The employee should report the loss to the employer if work systems are affected.

Affidavit of Loss and Cybercrime Concerns

If the lost SIM is used in hacking, scams, phishing, unauthorized transactions, or identity theft, cybercrime issues may arise.

The subscriber should:

  1. preserve evidence;
  2. file reports promptly;
  3. avoid deleting messages;
  4. secure accounts;
  5. report to telco;
  6. report to banks and wallets;
  7. file police or cybercrime report;
  8. execute affidavit of loss;
  9. obtain incident reference numbers;
  10. cooperate with investigation; and
  11. seek legal advice if accused of transactions made through the lost SIM.

An affidavit may help show that the subscriber did not authorize the later misuse.

Common Mistakes in Affidavits of Loss

Avoid these mistakes:

  1. failing to state the mobile number;
  2. failing to name the network provider;
  3. vague description of loss;
  4. wrong date of loss;
  5. inconsistent story between affidavit and telco report;
  6. claiming theft without police report when the facts are unclear;
  7. stating false ownership;
  8. omitting that the SIM is registered under another person;
  9. using a nickname instead of legal name;
  10. failing to notarize;
  11. using invalid ID before the notary;
  12. submitting photocopy when original is required;
  13. not signing every required page;
  14. using a generic affidavit that does not mention SIM replacement;
  15. forgetting to request deactivation;
  16. not mentioning linked accounts when relevant;
  17. not keeping a copy; and
  18. using a fake notary.

A precise affidavit reduces delay.

Common Reasons Telcos Reject SIM Replacement Requests

A telco may reject or delay replacement if:

  1. applicant is not the registered subscriber;
  2. ID does not match registration;
  3. affidavit is not notarized;
  4. affidavit lacks mobile number;
  5. SIM registration is incomplete;
  6. number is inactive or expired;
  7. number has been recycled;
  8. account has unpaid postpaid balance;
  9. ownership is disputed;
  10. representative lacks authority;
  11. corporate authorization is incomplete;
  12. verification answers are wrong;
  13. suspected SIM swap fraud;
  14. police report is required but not provided;
  15. documents appear fake;
  16. account is under investigation;
  17. SIM was recently replaced;
  18. there are multiple failed replacement attempts; and
  19. branch cannot access required account records.

The subscriber should ask for the specific reason and what document is needed.

Practical Checklist Before Going to the Telco Store

Bring:

  1. original valid ID;
  2. photocopy of valid ID, if required;
  3. notarized affidavit of loss;
  4. police report, if stolen or fraud-related;
  5. SIM registration proof;
  6. old SIM bed, if available;
  7. proof of recent load or billing statement;
  8. account number, if postpaid;
  9. phone where SIM was used, if available;
  10. proof of ownership of linked mobile wallet, if relevant;
  11. company authorization, if corporate SIM;
  12. SPA, if representative is allowed;
  13. replacement fee;
  14. list of linked accounts to secure; and
  15. incident reference number from customer service, if any.

Also be ready to answer verification questions.

Practical Checklist for the Affidavit

Before notarization, ensure the affidavit states:

  1. full legal name;
  2. complete address;
  3. valid ID details;
  4. mobile number;
  5. network provider;
  6. prepaid or postpaid status, if known;
  7. date and place of loss;
  8. circumstances of loss;
  9. efforts to recover;
  10. statement that SIM was not sold or transferred;
  11. request for replacement or deactivation;
  12. purpose of affidavit;
  13. signature;
  14. notarization details; and
  15. truthful facts.

Practical Checklist After SIM Replacement

After getting the replacement SIM:

  1. test calls and texts;
  2. test mobile data;
  3. confirm old SIM is deactivated;
  4. update SIM registration if required;
  5. reset telco app password;
  6. change banking passwords;
  7. check e-wallet access;
  8. update account recovery settings;
  9. enable stronger two-factor authentication;
  10. monitor transactions;
  11. inform employer if work accounts were affected;
  12. keep affidavit and replacement receipt;
  13. keep telco incident number;
  14. monitor contacts for scam messages; and
  15. report any suspicious activity immediately.

Frequently Asked Questions

Is an affidavit of loss required to replace a lost SIM card?

It is commonly required, but requirements vary by telco, account type, and circumstances.

Does the affidavit need to be notarized?

Yes, if the telco asks for an affidavit of loss. A proper affidavit is generally notarized.

Can I make my own affidavit?

Yes, but it must contain the necessary facts and be notarized. Many notaries can also draft one.

Can I replace a SIM registered under another person’s name?

Usually, the registered subscriber must request replacement. If you are only the user, you may need authorization from the registered subscriber.

What if my phone with the SIM was stolen?

Report to the telco immediately, secure financial accounts, consider filing a police report, and prepare an affidavit stating the theft or loss.

Is a police report required?

Not always for simple loss, but it is advisable or may be required for theft, fraud, unauthorized transactions, or stolen devices.

Can a representative replace my lost SIM for me?

Some telcos may allow it with strict authorization, but many require personal appearance for security reasons.

Can I recover the same number?

Usually yes if the number is active, registered to you, and not expired or recycled. The telco must verify eligibility.

What if the SIM was already deactivated?

Recovery depends on telco policy and whether the number is still available.

What if the lost SIM was used for fraud?

Report immediately to the telco, police, bank, wallet provider, and affected platforms. Preserve evidence and execute an affidavit of loss.

Can an affidavit protect me from liability?

It can help prove loss and timing, but it does not automatically eliminate liability. Prompt reporting and supporting evidence matter.

Can I use a fake affidavit to recover a number?

No. A false affidavit may create serious legal liability.

Legal Risks for Subscribers

Subscribers should be aware of the following risks:

  1. unauthorized transactions after loss;
  2. delayed reporting;
  3. false affidavit;
  4. inability to prove ownership;
  5. SIM registered under another person;
  6. loss of access to accounts;
  7. fraudulent SIM replacement by impostor;
  8. mobile wallet compromise;
  9. bank account takeover;
  10. identity theft;
  11. business impersonation;
  12. work data breach;
  13. recycled number issues;
  14. data privacy exposure; and
  15. criminal investigation if the SIM is used unlawfully.

The affidavit is only one protective step. Immediate reporting and account security are equally important.

Legal Risks for Telcos

Telcos must carefully handle lost SIM replacement because wrongful replacement can lead to:

  1. SIM swap fraud;
  2. unauthorized bank access;
  3. identity theft;
  4. privacy violations;
  5. customer complaints;
  6. regulatory scrutiny;
  7. civil liability;
  8. reputational harm;
  9. account takeover;
  10. business disruption;
  11. disputes between users and registered subscribers;
  12. improper deactivation;
  13. wrongful denial of legitimate replacement;
  14. mishandling of personal data; and
  15. failure to comply with SIM registration obligations.

Strict verification is not merely inconvenience. It is part of risk management.

Legal Risks for Notaries

A notary who notarizes an affidavit without personal appearance or proper identification may face notarial and administrative consequences.

The notary should:

  1. require personal appearance;
  2. verify competent evidence of identity;
  3. ensure the affiant understands the affidavit;
  4. not notarize blank or incomplete documents;
  5. enter the act in the notarial register;
  6. affix proper notarial details; and
  7. refuse suspicious documents.

A defective notarization may affect the validity of the affidavit.

When Legal Advice Is Needed

Legal advice may be needed when:

  1. the SIM was used for unauthorized bank transactions;
  2. the SIM was used in scams or crimes;
  3. the telco refuses replacement despite proof;
  4. the number is registered under another person;
  5. there is a dispute over ownership of the number;
  6. the SIM is tied to a business or corporate account;
  7. the lost SIM caused a data breach;
  8. a bank or wallet denies reimbursement;
  9. someone else obtained a replacement SIM;
  10. identity theft is suspected;
  11. the subscriber is accused of transactions made after loss;
  12. the affidavit involves a deceased subscriber;
  13. the SIM is part of a court case or investigation; or
  14. false documents may have been used.

Best Practices to Avoid Future SIM Loss Problems

Subscribers should:

  1. keep the SIM bed or SIM cardholder;
  2. keep proof of SIM registration;
  3. register SIMs under the correct name;
  4. avoid using SIMs registered under others;
  5. secure phones with strong lock screens;
  6. enable SIM PIN where appropriate;
  7. avoid sharing OTPs;
  8. use authenticator apps for important accounts;
  9. keep backup codes;
  10. update bank and wallet recovery options;
  11. avoid storing passwords in SMS;
  12. report lost phones immediately;
  13. record device IMEI;
  14. keep telco account information updated;
  15. avoid handing SIMs to untrusted repair shops;
  16. remove SIM before selling or disposing of phones;
  17. monitor mobile wallet and bank activity;
  18. use official telco channels only;
  19. avoid fixers for SIM replacement; and
  20. keep a digital copy of important account recovery information.

Conclusion

An affidavit of loss for a lost SIM card in the Philippines is a practical and legally important document. It supports the subscriber’s request for SIM replacement, deactivation of the lost SIM, recovery of the same mobile number, and protection against unauthorized use after loss.

However, the affidavit is only part of the process. The subscriber must still prove identity, show ownership or lawful use of the number, comply with SIM registration rules, satisfy telco verification, and secure linked accounts such as banks, mobile wallets, email, social media, and work systems.

The most important points are:

A lost SIM should be reported immediately. An affidavit of loss should be truthful, specific, and notarized. The mobile number and network provider should be clearly stated. A police report is advisable for theft, fraud, or unauthorized transactions. SIM replacement requires identity and ownership verification. A SIM registered under another person’s name may be difficult to replace. The affidavit does not automatically erase liability for unauthorized use. Banks, e-wallets, and online accounts should be secured immediately. False affidavits can create serious legal consequences.

Because a mobile number can control access to money, identity, and digital accounts, losing a SIM card should be treated as a security incident, not merely a lost accessory. The safest approach is to report the loss quickly, execute a proper affidavit, secure linked accounts, and complete replacement only through official telco channels.

Disclaimer: This content is not legal advice and may involve AI assistance. Information may be inaccurate.

Privacy Policy

Terms of Use

Lawyer Login

 
 
Privacy Policy         Terms of Use         Lawyer Login