When a mobile phone and its SIM card are stolen in the Philippines, many people are told to “execute an affidavit of loss.” That advice is common, but it is often incomplete. An affidavit of loss is only one document in a larger practical and legal process. In real-world situations, the person affected may also need a police report or blotter entry, valid identification, proof of ownership, a request for SIM replacement, and, depending on the purpose, supporting papers for banks, e-wallets, government accounts, employers, or insurance claims.

This article explains what an affidavit of loss is, when it is required, what it should contain, how it is used when both a phone and SIM card are stolen, how it relates to Philippine notarization practice, and the legal limits of the document.

1. What an affidavit of loss is

An affidavit of loss is a sworn written statement executed by a person who declares, under oath, that a specific item has been lost, misplaced, or stolen, and states the facts surrounding that loss to the best of the affiant’s knowledge.

In Philippine practice, it is commonly used for lost or stolen:

IDs
ATM cards and passbooks
certificates and licenses
official receipts
vehicle documents
gadgets
SIM cards
account-related documents

For a stolen phone and SIM card, the affidavit serves as formal written evidence of the incident from the owner or lawful possessor. It is usually notarized so that institutions can rely on it as a sworn declaration.

2. Is an affidavit of loss always legally required?

Not always.

There is no universal rule that every stolen phone or stolen SIM card automatically requires an affidavit of loss in all cases. In practice, the requirement usually comes from the institution you are dealing with, such as:

a telecommunications company for SIM replacement or account recovery
a bank or e-wallet provider when the missing SIM is tied to OTPs and account access
an employer if the phone is company-issued
an insurer for claims processing
a government office if the device or number was linked to official records
a school, cooperative, or private entity that requires sworn proof before processing a replacement or record update

So the better way to understand it is this: an affidavit of loss is often required operationally, even if not always expressly mandated by a single law for every theft scenario.

3. Why the affidavit matters when both the phone and SIM are stolen

A stolen phone is not just a missing gadget. In the Philippines, the greater legal and practical risk often lies in the stolen SIM card because the mobile number may be linked to:

OTP authentication
online banking
e-wallets
email recovery
social media recovery
government portals
lending apps
business accounts
work-related communication
SIM registration records

Because of this, the affidavit of loss may serve several functions at once:

A. Proof of the incident for replacement

Telecom providers and service desks may ask for a notarized affidavit before replacing a SIM tied to your name or account.

B. Support for account-security actions

Banks, e-wallets, and digital platforms may ask for proof that the device and number were stolen, especially if unauthorized access is suspected.

C. Documentation for future disputes

If fraudulent transactions happen after the theft, the affidavit helps establish the date you discovered the loss and the steps you took after discovery.

D. Basis for requests to block or suspend access

The affidavit may accompany requests to:

block the SIM
suspend a postpaid line
report a lost device
replace the number or SIM
update records with institutions

4. Stolen phone versus lost phone: why the distinction matters

A proper affidavit should be accurate. If the phone and SIM were stolen, the affidavit should say they were stolen, not merely “lost,” unless the exact circumstances are unknown.

This matters because:

theft suggests possible criminal conduct by another person
institutions may require a police report if there was theft
insurance claims may distinguish between loss and theft
false or careless wording can create inconsistencies in later reports

If the owner does not know exactly how the items disappeared, the affidavit may state that the phone and SIM were discovered missing under certain circumstances and that the affiant believes they were stolen, if that is the honest basis. The key is truthful drafting.

5. What “requirements” usually mean in practice

When people ask for the “requirements” for an affidavit of loss in the Philippines, they may mean one of two things:

First meaning: requirements for the contents of the affidavit

This refers to what facts should appear in the document.

Second meaning: requirements for using the affidavit

This refers to the supporting papers and steps needed so that a telco, bank, or other institution will accept it.

Both matter.

6. Core contents of an affidavit of loss for a stolen phone and SIM card

A proper affidavit of loss in Philippine practice usually contains the following:

A. Title

Usually: AFFIDAVIT OF LOSS

If desired, a more specific caption can be used, such as: AFFIDAVIT OF LOSS FOR STOLEN MOBILE PHONE AND SIM CARD

B. Personal details of the affiant

The person executing the affidavit should state:

full name
age
civil status
nationality
current residential address

This identifies the person making the sworn statement.

C. Statement of capacity

The affiant should state that he or she is the:

owner of the phone and SIM, or
lawful user/authorized possessor, if ownership is in another name, such as an employer or parent

If the SIM is registered under the affiant’s name, that may be stated. If not, that fact should also be stated honestly.

D. Description of the items

The document should identify the stolen items with reasonable particularity.

For the phone:

brand
model
color
storage variant, if useful
IMEI, if known
serial number, if available
phone number associated with the device, if relevant

For the SIM card:

mobile number
network provider
whether prepaid or postpaid
account name, if applicable
any account or subscriber number, if known

The rule is practical specificity. Enough detail should be given to identify the items clearly.

E. Circumstances of the theft or discovery of loss

This is one of the most important parts. It should state:

date of the incident or date of discovery
approximate time
place where it happened or was discovered
brief narrative of how the theft happened, if known
immediate steps taken after discovery

Examples of relevant facts:

the affiant was commuting and discovered the phone missing after alighting
the bag was slashed or opened
the phone was taken during a snatching incident
the room, office, or vehicle was forcibly opened
the items were last seen at a particular time and later found missing

Avoid dramatic language. State facts simply.

F. Statement that diligent efforts were made but recovery failed

Traditional affidavits of loss usually say that despite diligent efforts, the item could not be found or recovered.

In a theft situation, this can be phrased more precisely:

that the affiant exerted efforts to locate or recover the phone and SIM
that the same remain missing and unrecovered
that the affiant believes the same were stolen, if supported by facts

G. Purpose clause

The affidavit should state why it is being executed, for example:

to report the theft
to support the request for replacement of the SIM card
to block the lost or stolen line
to inform concerned institutions
to support related administrative, banking, or insurance requests

H. Signature of affiant

The affiant signs the document.

I. Jurat or notarial acknowledgment

For an affidavit, the notary usually uses a jurat because the document is sworn to before the notary. The affiant personally appears, presents competent proof of identity, and signs in the notary’s presence if not yet signed.

7. Supporting information that is highly advisable to include

Although not always mandatory, the following details make the affidavit more useful:

the exact mobile number of the stolen SIM
other numbers linked to the same device, if dual-SIM
IMEI of the phone
whether the SIM was inside the phone at the time of theft
whether the device had access to banking and e-wallet apps
whether the incident was reported to the police
whether the telco was immediately notified to deactivate or block the SIM
whether unauthorized attempts or transactions were later observed

These details strengthen the document, especially when the affidavit is later used to explain fraud, unauthorized access, or delay in replacement.

8. Documents commonly required together with the affidavit

The affidavit alone is often not enough. In the Philippines, institutions commonly ask for some combination of the following:

For SIM replacement

notarized affidavit of loss
valid government-issued ID
proof that the SIM or number belongs to you
additional subscriber verification
for postpaid accounts, account records or billing details
sometimes a police blotter or incident report, depending on internal policy or suspicious circumstances

For bank or e-wallet protection

affidavit of loss
valid ID
written dispute or incident report
screenshots of unauthorized transactions, if any
proof that the line was blocked or replacement requested
account ownership documents

For employer-issued phone or SIM

affidavit of loss
incident report to HR, IT, or admin
acknowledgment of accountability
proof of company assignment of device or line
police report, if company policy requires it

For insurance claims

affidavit of loss or theft
police report
proof of ownership
purchase receipt or invoice
device serial number or IMEI
policy documents and claim forms

For post-crime documentation

police blotter or formal complaint
affidavit of loss
any witness statements
screenshots of location tracking or suspicious activity
telecom correspondence
transaction records

9. Is a police blotter or police report required?

Not in every case, but it is often highly advisable, and sometimes practically indispensable.

If the phone and SIM were stolen, not merely misplaced, a police blotter or incident report is useful because it:

creates an official record of the theft
supports later claims of unauthorized use
may be required by insurers or institutions
helps establish the timeline of reporting
supports any criminal investigation

Where theft by snatching, robbery, burglary, or pickpocketing occurred, reporting to the police is especially important.

The affidavit of loss is your sworn statement. The police blotter is the police record of the reported incident. They are related but not the same thing.

10. The role of notarization

In the Philippines, an affidavit is ordinarily expected to be notarized to carry full practical weight in administrative and private transactions.

Why notarization matters

Notarization does not prove that every statement in the affidavit is true. What it does is:

convert the document into a notarized instrument
confirm that the affiant personally appeared before the notary
confirm the affiant was identified through competent evidence of identity
confirm the affidavit was sworn to before the notary

Personal appearance is required

The affiant generally must personally appear before the notary public. A ready-made affidavit handed over without proper appearance and oath-taking defeats the point of notarization and may create legal problems.

Bring valid identification

The affiant typically presents competent proof of identity, usually government-issued identification.

11. Can someone else execute the affidavit for you?

Usually, the affidavit should be executed by the person with personal knowledge of the facts.

For example:

the owner of the phone
the registered SIM subscriber
the actual possessor who discovered the theft

Another person may execute a related affidavit only if that person has direct knowledge and a legitimate basis, such as a parent for a minor, or an authorized representative for a company-owned device. But the more direct the knowledge, the stronger the affidavit.

If the SIM is registered in one person’s name but used by another, that complication should be disclosed. Institutions may require the registered subscriber to participate in the replacement process.

12. Special issue: the phone is yours, but the SIM is under another person’s name

This happens often in the Philippines. A phone user may be in actual possession of the device and number, but the registered subscriber may be:

a parent
spouse
employer
business owner
another relative

In that case, the affidavit should not pretend that ownership and registration are in the same person if they are not. It is better to state the facts clearly:

the affiant owned the phone or was the lawful user
the SIM was registered under another person’s name
the number had been assigned to or regularly used by the affiant
the affidavit is being executed to document the theft and support the necessary requests

Replacement of the SIM may still require the participation, authorization, or appearance of the registered subscriber, depending on the provider’s policy.

13. Special issue: prepaid versus postpaid SIM

The affidavit may be used differently depending on whether the line is prepaid or postpaid.

Prepaid

The main concern is replacement and recovery of access to the registered number, plus immediate blocking to prevent OTP abuse or identity misuse.

Postpaid

There may be additional concerns:

service charges while the line remains active
account liability
suspension requests
plan account verification
equipment bundles under the plan

A postpaid subscriber should report the theft promptly so billing, line activity, and account access can be addressed.

14. Why speed matters in stolen phone-and-SIM cases

An affidavit of loss is important, but it should not be the first and only reaction.

The moment the phone and SIM are stolen, there is a serious risk of:

OTP interception
account takeover
e-wallet theft
online banking compromise
identity misuse
social engineering against contacts
access to work systems
use of the SIM in scams

Legally and practically, the most defensible position is prompt action. Delay can complicate later disputes over fraudulent transactions. Even before the affidavit is executed, the affected person should, as circumstances allow:

contact the telco to block the SIM
lock or wipe the device remotely if possible
change passwords for email, banking, and critical accounts
report the incident to police
notify banks and e-wallet providers
preserve screenshots and timeline records

The affidavit then becomes part of the documentation trail.

15. What the affidavit should not contain

A good affidavit of loss must be truthful and restrained. It should not:

invent facts
exaggerate the circumstances
identify a suspect without basis
make legal conclusions not supported by facts
conceal who really owns or registered the items
use conflicting dates
claim certainty where there is only suspicion

For example, if the affiant only discovered the phone missing and did not actually witness the taking, the affidavit should not state as an absolute fact that a named person stole it unless there is direct basis.

False statements in a sworn affidavit can expose the affiant to legal risk.

16. Can an affidavit of loss be used as evidence in court?

Yes, but with limits.

An affidavit is evidence of a sworn statement, but it is not automatically conclusive proof of everything stated in it. In court or in contested proceedings, its weight depends on:

credibility
consistency with other evidence
supporting documents
testimony, if needed
absence of contradiction

For administrative or replacement purposes, a notarized affidavit is often accepted. For criminal prosecution, civil liability, or fraud disputes, additional proof is usually needed.

17. Does the affidavit transfer liability away from the owner?

No.

An affidavit of loss does not automatically erase liability, cancel fraudulent obligations, or guarantee reimbursement. It helps document the incident and the timeline, but legal consequences depend on the surrounding facts, such as:

when the theft happened
when it was discovered
when the telco or bank was notified
whether there was negligence
whether unauthorized transactions occurred before or after reporting
the applicable terms of service or contractual rules

The affidavit is important evidence, but not a magic shield.

18. Can the same affidavit be used for multiple institutions?

Sometimes yes, but use caution.

A single affidavit describing the stolen phone and SIM may be attached to multiple requests, especially when the facts are identical. But some institutions prefer:

an original notarized copy
a separately addressed request
institution-specific forms
more tailored language

Where several entities are involved, it is usually best that the affidavit be drafted broadly enough to cover the incident, while separate cover letters or request forms handle each institution’s specific needs.

19. Do you need separate affidavits for the phone and the SIM?

Not necessarily.

One affidavit may cover both items if:

both were stolen in the same incident
both belong to or were lawfully possessed by the affiant
both are sufficiently described
the intended purpose includes both gadget loss and SIM replacement

Separate affidavits may be useful if:

ownership is different
the phone and SIM have different legal or account holders
one institution only cares about the SIM
an insurer requires a more device-specific affidavit

20. What details are strongest for identifying the phone?

The most useful identifiers are:

IMEI
serial number
exact make and model
color
unique accessories or casing description
purchase receipt reference
box label or warranty information

If the phone’s IMEI is known, it should ideally be included. Many owners do not know it by memory, but it may appear on:

the original box
receipt
cloud account records
prior screenshots
device settings history
account dashboards

21. What details are strongest for identifying the SIM card or line?

Useful details include:

full mobile number
telco/network provider
prepaid or postpaid status
subscriber name
account number, if applicable
date the line had been in use
whether it was registered in the affiant’s name

Because the line is often the key to OTP-based systems, the number itself should appear clearly and accurately.

22. Common mistakes that cause rejection or delay

In practice, these are frequent problems:

A. Incomplete description of the phone or SIM

A vague statement like “I lost my cellphone and number” may be too thin.

B. No clear date or place

Institutions often want at least the date of loss or discovery.

C. Ownership is unclear

Especially where the number is under another person or entity.

D. The affidavit says “lost,” but the accompanying report says “stolen”

Inconsistency creates suspicion or confusion.

E. The affidavit is not notarized

Many institutions want notarization.

F. The name on the affidavit does not match the ID or subscriber records

This is a common practical issue.

G. Material alterations or erasures

Clean drafting matters.

H. The affiant did not actually read the document before signing

A risky and avoidable mistake.

23. Sample structure of a proper affidavit of loss

A typical structure is:

Title
Personal details of affiant
Statement that affiant is the owner/lawful possessor/user
Description of the phone
Description of the SIM card/number
Facts of theft or discovery of loss
Statement of efforts made and non-recovery
Statement of purpose
Signature
Notarial jurat

This is more important than fancy language. A clean, truthful, complete affidavit is better than one filled with unnecessary legal phrases.

24. Sample affidavit language

Below is a general sample in Philippine form:

AFFIDAVIT OF LOSS

I, [Full Name], of legal age, [civil status], [nationality], and a resident of [complete address], after having been duly sworn in accordance with law, do hereby depose and state:

That I am the owner/lawful possessor of one mobile phone described as [brand, model, color, storage, IMEI/serial number if known], and the user/subscriber of mobile number [number] under [network provider];
That on [date] at around [time], while I was at [place], my aforesaid mobile phone together with the SIM card bearing mobile number [number] was discovered missing and was stolen/lost under the following circumstances: [brief narration of facts];
That upon discovering the incident, I immediately exerted efforts to locate and recover the same, but despite diligent efforts, the said mobile phone and SIM card remain missing and unrecovered;
That I am executing this Affidavit of Loss to attest to the truth of the foregoing facts and for the purpose of supporting my request for the blocking and/or replacement of the SIM card, and for whatever legal and lawful purpose it may serve.

IN WITNESS WHEREOF, I have hereunto set my hand this [date] at [place], Philippines.

[Signature over printed name]

SUBSCRIBED AND SWORN to before me this [date] in [place], affiant exhibiting to me [ID details].

That template should be adjusted to the real facts. It should not be copied blindly if the circumstances are materially different.

25. Affidavit of loss versus complaint-affidavit

These are different documents.

Affidavit of loss

Used mainly to declare that an item was lost or stolen and to support replacement, record correction, or administrative processing.

Complaint-affidavit

Used when pursuing a criminal complaint against an identified or identifiable respondent. It is accusatory and is ordinarily part of criminal proceedings.

If the phone was stolen by an unknown person and your immediate goal is replacement and account protection, an affidavit of loss is usually the starting point. If a suspect is identified and prosecution is pursued, other affidavits or sworn complaints may follow.

26. Is the affidavit enough for criminal prosecution?

Usually no.

To pursue criminal liability for theft, robbery, or related offenses, authorities will typically need more than a bare affidavit of loss. They may require:

police investigation
witness statements
CCTV or surveillance footage
identification of the suspect
proof of ownership
recovery records
digital evidence
account logs

The affidavit is helpful, but prosecution depends on a broader evidentiary basis.

27. Interaction with digital fraud and unauthorized transactions

In stolen phone-and-SIM cases, legal problems often move quickly from theft to digital misuse.

The affidavit becomes especially important when:

unauthorized e-wallet transfers occur
online banking is accessed
social media accounts are taken over
lending or payment apps are used without authority
contacts are targeted through impersonation
work files are accessed from the device

In these situations, the affidavit helps show:

when you lost possession
when you became aware of the theft
that the device and number were no longer under your control
that you took steps to report and block them

That timeline may matter greatly in proving lack of authorization.

28. How detailed should the narrative be?

Detailed enough to be credible, but not overloaded.

A good narrative answers:

What was stolen?
When was it last in your possession?
When and where did you discover the loss?
Under what circumstances?
What did you do immediately after?

A weak narrative is too vague. A risky narrative includes guesses, hearsay, or dramatic claims without support.

29. Is a handwritten affidavit acceptable?

The critical issue is not whether it is handwritten or typed, but whether it is:

legible
complete
truthful
signed by the affiant
properly sworn to and notarized, if required

In practice, typed affidavits are more commonly used because they are easier for institutions to review and less likely to be misunderstood.

30. Language of the affidavit

The affidavit may be in English or Filipino, so long as:

the affiant understands it
the facts are clearly stated
the oath is properly administered
the notarial formalities are observed

The affiant should never sign an affidavit whose contents he or she does not fully understand.

31. What happens after the affidavit is executed?

Typically, the affidavit is then submitted to whichever institution requires it, such as:

the telco service center
the bank or e-wallet provider
the HR/admin office of the employer
the insurance company
the investigating police office
a government office updating records

Keep copies. Because the same incident may later lead to disputes or verification requests, a complete records file is wise:

copy of the affidavit
notarized original or duplicate originals, if available
police blotter
screenshots
telco ticket numbers
bank reports
emails and text notices
proof of SIM deactivation/replacement

32. Is there a filing deadline for the affidavit?

Usually, there is no single universal legal deadline for executing an affidavit of loss for a stolen phone and SIM. However, specific institutions may effectively impose urgency or practical deadlines through their claims or dispute processes.

Delay can hurt because:

accounts may be compromised before reporting
institutions may question late reporting
insurance periods may lapse
fraud disputes may be prejudiced by silence or delay

As a matter of prudence, it should be executed as soon as reasonably possible after discovery of the theft.

33. Can the affidavit mention both theft and request for replacement?

Yes, and in many cases it should.

A practical affidavit can state:

the phone and SIM were stolen or discovered missing under certain circumstances
they remain unrecovered
the affidavit is being used to support blocking and replacement of the SIM and other lawful purposes

This avoids the mistake of drafting an affidavit so generic that it does not clearly support the actual transaction being requested.

34. Who should keep the original?

That depends on who requires it. Some offices retain the original; others accept a certified or photocopied version after inspection. Because multiple institutions may require proof of the same incident, it is often sensible to prepare enough signed and notarized originals if allowed and necessary.

35. Practical legal checklist for Philippine users

For a stolen phone and SIM card, the most legally useful sequence is:

Secure accounts immediately
Contact the telco and request blocking/deactivation
Report the theft to the police
Prepare a complete affidavit of loss
Have it notarized properly
Gather proof of ownership and valid IDs
Submit the affidavit to the relevant telco, bank, employer, insurer, or platform
Preserve all reference numbers and copies

This sequence strengthens your documentary trail and helps protect against later disputes.

36. Bottom line

In the Philippine setting, an affidavit of loss for a stolen phone and SIM card is a sworn statement that formally documents the theft or discovery of the loss and supports practical next steps such as SIM replacement, account protection, record updating, and sometimes insurance or investigative processes.

Its essential requirements are:

correct identification of the affiant
clear description of the phone and SIM
truthful account of the theft or loss
date, place, and surrounding circumstances
statement of non-recovery despite efforts
statement of purpose
signature under oath
proper notarization

But the affidavit should not be misunderstood. It is important, yet usually only one part of the full response required after a stolen phone-and-SIM incident. In many real cases, it works best together with a police report, valid IDs, proof of ownership, and immediate protective action with telecom, banking, and digital-service providers.

A careful affidavit helps establish the facts. A prompt and documented response helps protect your rights.