Losing a SIM card is a small problem that can quickly become a serious one. A lost SIM may contain access to calls, text messages, one-time passwords, e-wallets, online banking alerts, social media recovery codes, and identity verification channels. In the Philippines, one of the most commonly requested supporting documents for replacing a lost SIM is an Affidavit of Loss.

This article explains, in Philippine legal context, what an Affidavit of Loss for a SIM card is, when it is required, how to get one, what it should contain, how much it usually costs, what documents to bring, how it is used for SIM replacement, and what legal and practical issues a person should know.

I. What an Affidavit of Loss Is

An Affidavit of Loss is a sworn written statement executed by a person who has lost an item and is declaring the facts of that loss under oath before a notary public. It is not a court order, permit, or government-issued certification. It is simply a notarized affidavit.

In the case of a SIM card, the affidavit typically states that:

the affiant is the lawful user, owner, or registered subscriber of the SIM;
the SIM card was lost, misplaced, stolen, damaged beyond recovery, or could no longer be found;
despite diligent efforts, it could not be recovered;
the affidavit is being executed to support a request for SIM replacement, reissuance, account updating, or other lawful purpose.

In Philippine practice, an Affidavit of Loss is often used whenever a person needs to formally document the loss of something important, especially where replacement by a telco, bank, school, employer, or government office may require a sworn explanation.

II. Why It Matters for a Lost SIM Card

A SIM card is more than a plastic chip. It may be linked to:

mobile number identity;
OTP delivery for banks and e-wallets;
email and social media recovery;
messaging apps;
telecom account records;
postpaid or prepaid subscriber records;
SIM registration records.

Because of this, a telecom provider may require proof that the person requesting a replacement is the legitimate subscriber or authorized user. An Affidavit of Loss helps document that claim and reduces the risk of fraudulent number takeover.

In practical terms, it serves three functions:

1. It creates a formal record of the loss

The affidavit states when and how the SIM was lost or discovered missing.

2. It supports the replacement request

It is often submitted together with a valid ID and other subscriber details to request replacement of the same mobile number.

3. It protects the affiant

A sworn declaration helps show that the affiant promptly documented the loss and did not voluntarily transfer the SIM to someone else.

III. Is an Affidavit of Loss Always Required?

Not always.

Whether an affidavit is required depends on the telecommunications provider’s internal requirements, the type of account, and the circumstances of the loss. In some cases, a telco may allow replacement with only a valid ID and account verification. In other cases, especially where identity or account ownership needs stronger proof, an Affidavit of Loss may be asked for.

It is more likely to be required when:

the SIM is lost and cannot be physically presented;
the subscriber needs to retain the same number;
the account information is incomplete or needs verification;
the SIM is linked to a postpaid line;
there is a discrepancy in registered name or subscriber records;
the subscriber is acting through an authorized representative;
there is suspicion of theft, fraud, or disputed ownership.

So legally, the affidavit is not a universal statutory prerequisite in every single case. Practically, it is a very common supporting document.

IV. Philippine Legal Context

In the Philippines, an affidavit is generally treated as a sworn statement. Its legal force comes from the fact that the declarant swears before a notary public that the contents are true.

Several legal principles are relevant:

1. Affidavits are sworn statements

An affidavit must be voluntarily signed by the affiant and acknowledged or jurat-completed before a notary public.

2. False statements can create legal liability

If a person knowingly lies in an affidavit, that can lead to criminal, civil, or administrative consequences depending on the circumstances. A false affidavit is never a harmless formality.

3. Notarization converts a private document into a notarized public document

In Philippine legal practice, notarization gives a document stronger evidentiary weight than an unsigned or unnotarized private statement.

4. SIM replacement is governed mainly by provider procedure plus identity verification

For lost SIMs, the actual replacement process is usually operational rather than judicial. The affidavit is one part of an identity and loss-verification package.

V. When You Need an Affidavit of Loss for a SIM Card

An Affidavit of Loss for a SIM card is commonly used in these situations:

the SIM card is physically lost;
the phone was lost or stolen with the SIM inside;
the SIM was removed and then misplaced;
the SIM has been damaged and cannot be read, and the provider requires a sworn explanation;
the subscriber wants a replacement SIM carrying the same number;
the SIM is tied to banking, e-wallet, or business use and the user wants documentation for record purposes;
an authorized representative will process the replacement on behalf of the subscriber.

It can also be useful even if not expressly required, especially where the number is important for financial or professional reasons.

VI. Who Should Execute the Affidavit

The affidavit should be executed by the registered subscriber or the person who can truthfully claim lawful ownership or authorized use of the SIM.

This varies by situation:

A. Prepaid SIM registered in the user’s own name

The registered subscriber should sign.

B. Postpaid account

The account holder should sign, unless the telco accepts a corporate or representative process.

C. Corporate or business-issued SIM

The company’s authorized officer may need to sign, often together with supporting authority such as a secretary’s certificate, authorization letter, or company ID.

D. Minor user

If the line is registered under a parent or guardian, the registered adult or lawful representative usually handles the affidavit and replacement process.

E. Representative filing for someone else

The subscriber usually executes the affidavit, and the representative brings an authorization letter, IDs, and any other telco-required documents.

The key rule is simple: the person signing must have personal knowledge of the facts and legal standing to make the declaration.

VII. What Information the Affidavit Should Contain

A proper Affidavit of Loss for a SIM card should be clear, specific, and truthful. It should generally include the following:

1. Title

Usually: Affidavit of Loss

2. Affiant’s personal details

This commonly includes:

full name;
age;
civil status;
nationality;
address.

3. Statement of identity and capacity

The affiant states that they are the registered subscriber, lawful owner, or authorized user of the SIM.

4. Description of the SIM or mobile number

Since a SIM card is tiny and often not identified by serial number in ordinary use, the most important identifier is usually the mobile number. Other details may include:

mobile number;
network provider;
account type (prepaid or postpaid, if relevant);
SIM serial or ICCID, if known;
account/subscriber number, if postpaid.

5. Facts of loss

The affidavit should state:

when the SIM was lost, or when the loss was discovered;
where it was last seen or likely lost;
the circumstances of loss, if known;
whether it may have been stolen, misplaced, or accidentally discarded;
efforts made to find or recover it.

Absolute precision is not required if the facts are uncertain, but the statement must be honest. If the exact date is unknown, the affidavit may say “sometime on or about” or “discovered on.”

6. Declaration of non-recovery

The affiant typically states that despite diligent efforts, the SIM could no longer be found or recovered.

7. Purpose clause

The affidavit should state why it is being executed, such as:

to request replacement or reissuance of the SIM;
to support a request for retention of the same mobile number;
for submission to the telecom provider;
for any other lawful purpose.

8. Signature and notarization

The affiant signs the document before the notary public.

VIII. Sample Structure of a SIM Card Affidavit of Loss

A standard Philippine-style format usually reads like this in substance:

title;
introductory identification of the affiant;
statement that the affiant is the registered subscriber/lawful user of a certain mobile number;
narration of when and how the SIM was lost;
declaration that despite diligent efforts, the SIM cannot be found;
declaration that the affidavit is being executed to support replacement/reissuance and for other lawful purposes;
signature of affiant;
jurat by the notary public.

The wording can be simple. What matters is that it is accurate, consistent, and notarized.

IX. Where to Get an Affidavit of Loss

In the Philippines, there are several ordinary ways to get one drafted:

1. From a lawyer

A lawyer may draft the affidavit for you and refer you for notarization, or notarize it if proper notarial requirements are met.

2. From a notarial office

Many notarial offices and law offices prepare standard affidavits, including Affidavits of Loss, on request.

3. From legal document service providers

Some offices near city halls, halls of justice, public markets, or commercial areas offer affidavit drafting and notarization services.

4. By bringing your own draft to a notary public

A person may prepare the text and have it notarized, provided the notary is satisfied with identity, voluntariness, and compliance.

X. How to Get One Step by Step

Step 1: Gather the details of the lost SIM

Before going to a lawyer or notary, prepare the details:

full name and address;
mobile number;
network provider;
prepaid or postpaid status;
when the SIM was lost or discovered missing;
where it was likely lost;
brief explanation of the incident;
purpose: SIM replacement or reissuance.

If available, also prepare account documents such as old load receipts, billing statements, telco account references, or SIM registration details.

Step 2: Bring valid identification

The notary public will require proof of identity. Bring valid government-issued ID whenever possible.

Commonly accepted IDs in practice include:

passport;
driver’s license;
UMID;
PhilSys ID or national ID;
PRC ID;
voter’s ID if still accepted by the office;
postal ID if accepted;
other competent evidence of identity recognized by the notary.

Notarial practice is strict about identity. The affidavit cannot be validly notarized if the affiant’s identity is not properly established.

Step 3: Have the affidavit drafted

You may ask the office to prepare it, or bring a prepared draft for review.

The draft should be checked for:

correct spelling of the name;
correct mobile number;
accurate facts;
consistent dates;
proper purpose.

Step 4: Read before signing

Do not sign first and read later. Because it is sworn under oath, every statement should be verified before signing.

Step 5: Sign in the presence of the notary

The affiant should appear personally before the notary public. Personal appearance is a core notarial requirement in Philippine practice.

Step 6: Pay drafting and notarization fees

Fees vary by office and locality.

Step 7: Get certified copies if needed

It is often wise to keep several photocopies or certified copies because the affidavit may be needed not only for the telco but also for banks, e-wallets, employers, or internal records.

XI. Usual Cost in the Philippines

There is no single nationwide fixed price. In practice, cost depends on location, the office, and whether the document is drafted for you or merely notarized.

Typical charges usually include one or both of the following:

drafting fee, if the office prepares the affidavit;
notarial fee, for notarization.

In ordinary practice, a simple Affidavit of Loss is often inexpensive compared to full legal services, but prices vary widely by city and office. In some places, it may be a few hundred pesos; in others, more.

Factors affecting cost:

city or province;
law office versus neighborhood notarial service;
urgency;
number of copies;
whether authorization letters or related affidavits are also needed.

XII. Documents Commonly Needed Alongside the Affidavit

For SIM replacement, the affidavit is usually not enough by itself. Telecom providers commonly ask for supporting identification and account details. These may include:

valid ID of the subscriber;
copy of the Affidavit of Loss;
proof of SIM ownership or usage;
latest bill for postpaid accounts;
authorization letter, if represented by another person;
representative’s valid ID;
proof of relationship or authority in special cases;
SIM registration details, where applicable;
police report, if the phone or SIM was stolen and the provider asks for it.

Different providers may impose different documentary requirements.

XIII. Difference Between Lost SIM and Lost Phone

People often confuse the two, but the affidavit should match the actual loss.

A. If only the SIM was lost

The affidavit should focus on the SIM card or number.

B. If the phone was lost with the SIM inside

The affidavit may mention that the mobile phone, containing the SIM card, was lost or stolen. If the purpose includes blocking the line and replacing the SIM, the affidavit should say so.

C. If both phone and SIM were stolen

It is better to state the fact clearly. In some situations, a police blotter or police report may also be useful, especially if identity misuse is feared.

XIV. Is a Police Report Required?

Usually, not automatically.

An Affidavit of Loss is different from a police report. A police report is made before law enforcement; an affidavit is a sworn statement before a notary.

A police report may be useful when:

the phone or SIM was stolen;
fraud, extortion, identity theft, or unauthorized transactions occurred;
banks or e-wallets ask for it;
the telco requires more documentation due to suspicious activity;
the user wants an official law-enforcement record.

But for a simple accidental loss, a police report is often not the primary requirement unless specifically asked.

XV. What Happens After You Get the Affidavit

Once you have the notarized Affidavit of Loss, the next practical steps usually are:

1. Contact the telecom provider immediately

Request blocking, suspension, or replacement as appropriate. This reduces risk of unauthorized use.

2. Secure linked accounts

Because the lost SIM may receive OTPs, the user should quickly secure:

bank accounts;
e-wallets;
email accounts;
social media;
messaging apps.

3. Submit the requirements for SIM replacement

This typically includes the affidavit plus ID and account verification.

4. Request retention of the same number

This is often the main reason for the affidavit.

5. Update account recovery information if needed

If the process takes time, users should consider alternative recovery options for critical accounts.

XVI. Importance of Immediate Action

A lost SIM should never be treated casually. It can be used for:

OTP interception;
password reset attempts;
impersonation;
scam texting using the user’s number;
unauthorized account access if paired with other compromised data.

In legal and evidentiary terms, promptly executing an Affidavit of Loss and notifying the provider helps show diligence and good faith.

XVII. Common Mistakes to Avoid

1. Wrong mobile number

A single digit error can derail the replacement process.

2. Inaccurate facts

Do not invent a date, place, or theft narrative if you are uncertain. Say only what you know.

3. Signing outside the notary’s presence

That can create a defective notarization problem.

4. Using someone else’s identity details

The affiant must be the real person with personal knowledge and legal standing.

5. Treating the affidavit as the only requirement

The telco may still require ID, registration matching, billing proof, or in-person verification.

6. Delaying notification to the provider

A delayed report can increase fraud risk.

7. Forgetting linked accounts

The bigger danger is often not the lost SIM itself, but what the number can unlock.

XVIII. Can Someone Else Get the Affidavit for You?

A representative can help process documents, but the affidavit itself should generally be signed by the person making the sworn declaration, unless a legally proper representative capacity exists.

For example:

a parent may act for a minor;
a company officer may act for a corporate subscriber;
an attorney-in-fact may act within authority, depending on the circumstances.

But as a rule, the person with direct knowledge of the loss should execute the affidavit. If a representative will transact with the telco, separate supporting papers may be needed, such as:

authorization letter;
special power of attorney, when necessary;
IDs of both parties;
proof of authority for corporate accounts.

XIX. Can an Affidavit of Loss Be Used for a Prepaid SIM?

Yes. A prepaid subscriber may use an Affidavit of Loss to support replacement, especially where the goal is to recover the same number and establish subscriber identity. In modern practice, prepaid lines can be highly important because they are frequently linked to financial and digital accounts.

The practical issue with prepaid lines is proof of ownership. The user should be ready to provide whatever evidence the telco accepts, such as:

SIM registration details;
previous load patterns or receipts;
frequently called numbers, if used for verification;
ID matching the registered record;
old SIM bed or packaging, if still available.

XX. Can It Be Used for a Postpaid SIM?

Yes, and it is often even more straightforward because postpaid accounts usually have more complete subscriber records. The postpaid account holder may still be asked for:

valid ID;
latest billing statement;
account number;
authorization documents if represented.

XXI. What if the SIM Was Damaged, Not Lost?

Some providers distinguish between a lost SIM and a damaged SIM. If the old SIM is physically available, an Affidavit of Loss may not be the proper document because there was no actual loss. But in some practical cases, the office may still accept a similar affidavit or explanation where the SIM is unreadable, broken, or no longer recoverable.

The more accurate the document, the better. If the SIM still exists but is defective, the statement should not falsely claim “loss” if that is not true.

XXII. What if the SIM Was Stolen?

If the SIM was stolen, the affidavit should say so if the affiant honestly believes that to be the case. It may be titled simply Affidavit of Loss, but the body can state that the SIM or phone containing the SIM was stolen.

Where theft is involved, the affiant should consider:

reporting the incident to the telco immediately;
changing passwords on linked digital accounts;
contacting banks and e-wallets;
making a police report if misuse is possible or has already happened.

XXIII. Is There a Standard Government Form?

Generally, no single universal government-issued form governs all SIM-card Affidavits of Loss. The document is usually prepared in ordinary affidavit format by a lawyer, notary, or legal document preparer.

What matters is not a special title template, but the legal sufficiency of the sworn statement and the acceptance requirements of the telecom provider.

XXIV. Notarization Rules Matter

A SIM card affidavit may seem routine, but notarization is still formal legal work. Key principles include:

personal appearance of the affiant;
presentation of proper identification;
actual administration of oath or affirmation;
complete notarial details;
entry in the notarial register, where required.

A poorly notarized document may be rejected or questioned.

XXV. Evidentiary Value of the Affidavit

An Affidavit of Loss does not conclusively prove that the SIM was lost exactly as narrated. It is evidence of the affiant’s sworn declaration. Its practical value comes from:

the oath taken by the affiant;
the authenticity added by notarization;
the consistency of the statement with supporting documents;
the telco’s acceptance of it for processing.

It is persuasive and useful, but not magical. If the subscriber record does not match the claimant, additional proof may still be required.

XXVI. Legal Risks of False Statements

Because the affidavit is sworn, it should never contain invented facts. A person who falsely claims ownership of a SIM or fabricates loss details may face legal consequences. This matters especially where the mobile number is connected to money, identity verification, or fraud complaints.

The affidavit should be honest about uncertainty. For example:

“I discovered on or about [date] that the SIM was missing.”
“I may have misplaced it while traveling.”
“Despite efforts to locate it, I was unable to recover it.”

That is far safer than false certainty.

XXVII. Practical Tips Before Going to the Telco

Before filing for replacement, it is prudent to prepare the following:

notarized Affidavit of Loss;
original valid ID and photocopies;
proof of ownership or registration;
another working contact number;
record of recent transactions linked to the number;
billing statement, if postpaid;
authorization documents, if someone else will process it.

It is also useful to write down the facts in chronological order so the affidavit, telco form, and any report all match.

XXVIII. Affidavit of Loss vs. Authorization Letter

These are different documents.

Affidavit of Loss

A sworn statement narrating the loss.

Authorization Letter

A private document allowing another person to transact on one’s behalf.

A telco may require both if:

the subscriber lost the SIM; and
another person will process the replacement.

XXIX. Affidavit of Loss vs. SIM Replacement Form

Also different.

Affidavit of Loss

Prepared and notarized outside or before submission; explains the loss.

SIM Replacement Form

Usually the provider’s own internal request form to process issuance of a new SIM.

The affidavit supports the replacement form but does not replace it.

XXX. Is Court Action Needed?

No, not for the ordinary replacement of a lost SIM card.

An Affidavit of Loss is not a lawsuit. Most SIM-loss situations are handled administratively through the telecom provider’s customer service and verification process.

Court action would only arise if there were separate disputes, fraud, identity theft, damage claims, or criminal issues.

XXXI. Suggested Content for Accuracy

For best results, the affidavit should avoid vague wording like “I lost my SIM somewhere.” Better content includes:

approximate date and time;
approximate place;
whether the phone was also lost;
whether the SIM was prepaid or postpaid;
the mobile number involved;
reason for executing the affidavit.

Accuracy and specificity make the document stronger and more useful.

XXXII. How Long the Affidavit Remains Useful

An Affidavit of Loss does not usually expire by itself in the same way an ID does, but its usefulness is tied to the transaction for which it is submitted. Because a lost SIM replacement is time-sensitive, it is best used promptly after execution.

A telco may prefer a recently executed affidavit rather than one made long after the loss.

XXXIII. Can It Be Handwritten?

In principle, affidavits may be handwritten if legible and formally sufficient, but in practice, a typed affidavit is far better. It is easier to review, photocopy, submit, and notarize. Most notarial offices use typed forms.

XXXIV. Language of the Affidavit

It may be in English or Filipino, provided the affiant understands it. The notary must be satisfied that the affiant understands the contents of the document being sworn to.

XXXV. Sample Use Case

A person in Manila loses a prepaid SIM linked to their e-wallet and online banking. They discover the loss in the evening and cannot find the SIM after searching at home and retracing their route. The next day, they prepare an Affidavit of Loss stating the mobile number, network, approximate time of discovery, efforts to locate the SIM, and purpose of requesting replacement. They bring a valid ID, notarize the affidavit, contact the provider to secure the line, and submit the affidavit with additional identity requirements for same-number replacement.

That is the ordinary legal and practical role of the document.

XXXVI. Bottom Line

In the Philippines, getting an Affidavit of Loss for a SIM card usually means preparing a sworn statement that identifies the subscriber, describes the lost SIM and the circumstances of loss, states that it could not be recovered despite diligent efforts, and declares that the document is being executed to support SIM replacement or another lawful purpose. The affidavit must then be signed before a notary public after proper identification and personal appearance.

It is a simple document, but it matters because a lost SIM can expose a person to identity and account-security risks. The affidavit is commonly used to support replacement of the same number, especially when the telecom provider needs formal proof of loss and subscriber identity. Its value lies not only in meeting documentary requirements, but also in promptly creating a sworn record of the incident.