Getting debt collection calls for a person who owned your mobile number before you can be stressful, especially when the caller sounds aggressive or insists that “this number is in our records.” In the Philippines, the short answer is clear: you do not become liable for someone else’s debt just because you now use their old phone number. A collector must correct outdated records, stop harassing uninvolved people, and follow Philippine rules on fair debt collection, data privacy, and consumer protection.

Quick Answer: You Are Not Liable for the Previous Owner’s Debt

A phone number is not a loan contract. A SIM card is not a promissory note. A recycled mobile number does not make you the borrower.

Under the Civil Code of the Philippines, obligations arise from specific legal sources such as law, contracts, quasi-contracts, crimes, and quasi-delicts. A debt normally comes from a contract between the lender and the borrower. The Civil Code also states that contracts generally bind only the parties, their assigns, and heirs.

This means a debt collector cannot lawfully treat you as responsible unless you are actually connected to the obligation in a legally recognized way, such as:

You are the actual borrower.
You signed as a co-maker, meaning you agreed to be jointly liable.
You signed as a guarantor or surety, meaning you agreed to answer for the debt if the borrower fails to pay.
You are an authorized representative of the debtor.
You inherited the debtor’s estate, and the claim is properly made against the estate, not against you personally beyond what the law allows.

Merely answering calls on a mobile number that once belonged to the borrower is not enough.

Why Debt Collectors Keep Calling Wrong Numbers

Wrong-number debt collection calls happen often in the Philippines because mobile numbers are reused, borrowers change SIMs, and collection databases are not always updated.

Common reasons include:

The previous owner of your number used it in a loan application.
The borrower entered a fake or old number.
The borrower listed your number as a reference without your knowledge.
An online lending app accessed the borrower’s phone contacts.
A collection agency bought or received an old account file.
The creditor’s system has not been corrected even after being told the number is wrong.

This is not your fault. Once you inform the collector that they have the wrong person, continued calls may raise issues under Philippine data privacy, financial consumer protection, and debt collection rules.

Your Legal Rights Under Philippine Law

Your mobile number can be personal information

Under the Data Privacy Act of 2012, Republic Act No. 10173, personal information includes information from which a person’s identity is apparent or can reasonably be identified. A mobile number linked to your name, SIM registration, messages, call logs, or account records can be personal information.

The Implementing Rules and Regulations of the Data Privacy Act require personal data processing to follow the principles of:

Transparency — you should know who is using your data and why.
Legitimate purpose — the use of your data must have a lawful and proper reason.
Proportionality — the use of your data must be limited to what is necessary.

If a collector keeps processing your number for another person’s debt after you already explained that the number is wrong, the record may be inaccurate, outdated, excessive, or unlawfully retained.

As a data subject, you may assert rights such as:

The right to know how your number was obtained.
The right to object to further processing.
The right to request correction of inaccurate data.
The right to request blocking, removal, or destruction of data when legally justified.
The right to file a complaint with the National Privacy Commission.

The National Privacy Commission also warned online lenders against harvesting borrowers’ phone and social media contact lists for collection harassment. The NPC’s advisory on online lenders and contact-list harvesting is especially relevant when collectors call people who never borrowed money.

SIM registration can help show you are the current user

The SIM Registration Act, Republic Act No. 11934, requires SIMs to be registered before activation. For individuals, registration involves information such as full name, date of birth, address, and a valid government ID. Foreign nationals using Philippine SIMs also have specific registration requirements, such as passport and immigration-related documents depending on their status.

Your SIM registration does not make you liable for the previous owner’s debt. Instead, it can help show that you are the current registered end-user of the number.

However, be careful: do not send photos of your ID, passport, ACR I-Card, or SIM registration screenshots to a random caller. Ask for the company’s official email address, data protection officer, website, and regulator first. Sensitive documents should only be shared through verified official channels or with a government agency when required.

Debt collectors cannot use harassment or unfair collection practices

The legal rules depend on who the creditor is.

If the debt is from a lending company, financing company, or many online lending platforms, the Securities and Exchange Commission is usually involved. The Lending Company Regulation Act of 2007, Republic Act No. 9474, and the Financing Company Act of 1998, Republic Act No. 8556, regulate many of these businesses.

The SEC’s rules on unfair debt collection, including SEC Memorandum Circular No. 18, Series of 2019, prohibit abusive practices by lending and financing companies and their third-party collection agents. These include acts such as:

Threatening violence or criminal action that cannot legally be taken.
Using insults, obscenities, or abusive language.
Publicly shaming borrowers.
Disclosing personal information to third parties.
Misrepresenting the collector’s authority.
Threatening legal action without basis.
Calling at unreasonable hours.
Contacting people in the borrower’s contact list who are not guarantors or co-makers.

This is important for wrong-number cases. Even if the borrower gave your number, that does not make you a guarantor, co-maker, or debtor.

For banks, credit card issuers, e-wallets, pawnshops, remittance companies, payment operators, and other Bangko Sentral ng Pilipinas-supervised financial institutions, the Financial Products and Services Consumer Protection Act, Republic Act No. 11765, and BSP Circular No. 1160, Series of 2022, require fair treatment, protection of consumer data, and effective complaint handling.

RA 11765 also makes financial service providers responsible for their accredited third-party service providers, including collectors. A company cannot avoid responsibility by saying, “Collection agency lang po iyon.”

When Wrong-Number Calls Become a Bigger Legal Problem

A single mistaken call may be an error. Repeated calls after correction are different.

The situation becomes more serious when the collector:

Keeps calling after being told the number is wrong.
Refuses to identify the company, creditor, or collection agency.
Threatens arrest, barangay action, NBI action, police action, or court action without basis.
Calls your family, employer, neighbors, or social media contacts.
Sends messages implying that you are the debtor.
Uses profanity, insults, or intimidation.
Calls very early, very late, or repeatedly throughout the day.
Demands that you pay “kahit maliit lang” to stop the calls.
Asks for OTPs, banking details, photos of IDs, or passwords.
Uses spoofed numbers or pretends to be from a government office.

Depending on the facts, these acts may involve civil liability under the Civil Code, regulatory violations, data privacy violations, or criminal issues.

Under Articles 19, 20, 21, and 26 of the Civil Code, a person who acts contrary to law, good morals, public policy, or the privacy and peace of mind of another may be liable for damages. Article 26 specifically protects people from acts that disturb private life, vex, or humiliate another person.

Under the Revised Penal Code, extreme conduct may fall under offenses such as grave threats, coercion, or unjust vexation, depending on the exact words and acts used. In Maderazo v. People, the Supreme Court described unjust vexation as a broad offense covering conduct that unjustifiably annoys or vexes another person.

If threats, harassment, or deception are done through calls, texts, chat apps, email, or social media, the Cybercrime Prevention Act framework may also matter because offenses committed through information and communications technology can carry cybercrime consequences.

What to Say During the First Call

Keep your response short, calm, and firm. Do not argue about the debt.

You can say:

“This is a wrong number. I am the current user of this mobile number, but I am not [borrower’s name]. I am not the borrower, co-maker, guarantor, surety, or authorized representative. Please update your records, stop contacting this number about that debt, and give me your company name, the creditor’s name, your official complaints email, and your data protection officer contact.”

Then ask:

What company are you calling from?
Are you the original creditor or a third-party collection agency?
What is your SEC registration, BSP-supervised institution name, or business address?
Who is your data protection officer or privacy contact?
What is your official email address for wrong-number and data correction requests?
Where did you get this number?

Do not say:

“I will pay just to stop the calls.”
“I know where that person lives.”
“I will tell them to pay.”
“Send me the loan documents.”
“Here is my ID.”
“Here is my OTP.”

The goal is to correct the record, not to become involved in the debt.

Step-by-Step Guide to Stop Debt Collection Calls for the Previous Number Owner

1. Preserve evidence before blocking

Before blocking the number, collect basic proof. Evidence is important if the calls continue.

Keep:

Screenshots of call logs.
Screenshots of SMS, Viber, Messenger, WhatsApp, or email messages.
Dates and times of calls.
Names used by callers.
Numbers used by callers.
The company or lending app name mentioned.
The name of the supposed borrower.
Notes of the exact threats or abusive words used.
Proof that you already told them the number is wrong.

Be careful with secret call recordings. The Philippines has an Anti-Wiretapping Law, and recording conversations can raise legal issues depending on the situation. Safer evidence includes screenshots, call logs, written messages, voicemails voluntarily left by the caller, and detailed notes made immediately after the call.

2. Tell them once, clearly, that it is a wrong number

A collector may claim they “did not know” the number was already reassigned. Remove that excuse.

Send one clear written message if possible:

“This is a wrong number. I am not the borrower, co-maker, guarantor, surety, or representative. Please remove this number from your records and stop contacting me about this account.”

Take a screenshot after sending it.

3. Send a formal wrong-number and data correction request

If the calls continue, send a short formal notice to the lender, financing company, bank, online lending app, or collection agency.

Use an official email address from the company’s website, app, privacy notice, SEC records, BSP records, or verified support channel. Avoid sending personal documents to random Gmail, Yahoo, or unverified accounts.

Include:

Your mobile number.
The date the calls started.
The name of the borrower they keep mentioning, if known.
A statement that you are not the debtor, guarantor, co-maker, surety, or representative.
A request to remove or correct your number.
A request for the source of your number.
A request for written confirmation.

Sample wrong-number notice

Subject: Wrong Number — Request to Stop Debt Collection Calls and Correct Records

To the Data Protection Officer / Complaints Officer:

I am the current user of mobile number [09XX XXX XXXX]. Since [date], your callers or messages have contacted this number about an alleged debt of [name mentioned by collector, if any].

I am not that person. I am not the borrower, co-maker, guarantor, surety, reference who consented to collection contact, or authorized representative for this account.

Please do the following:

Correct your records and remove my mobile number from this account.
Stop all calls, texts, chats, and collection messages to this number regarding this debt.
Inform me where your company obtained this number.
Identify the creditor, collection agency, and responsible complaints or data protection contact.
Confirm in writing once this correction has been completed.

I object to the continued processing of my mobile number for this unrelated debt under the Data Privacy Act of 2012 and applicable financial consumer protection and debt collection rules.

Thank you.

[Name or initials] [Mobile number] [Date]

4. Identify the correct agency for your complaint

Different agencies handle different types of collectors.

Situation	Where to complain	Useful legal basis	What to attach
Online lending app, lending company, financing company, or collection agency for them	SEC I-Message Mo portal	RA 9474, RA 8556, SEC debt collection rules, RA 11765	Screenshots, call logs, wrong-number notice, company/app name
Bank, credit card issuer, e-wallet, remittance company, pawnshop, or BSP-supervised institution	First use the company’s consumer assistance channel, then BSP consumer assistance channels if unresolved	RA 11765, BSP Circular No. 1160	Complaint reference, screenshots, call logs, written request
Misuse of your mobile number, refusal to correct records, contact-list harvesting, privacy violation	National Privacy Commission complaint process	Data Privacy Act of 2012 and its IRR	Notarized complaint form if required, evidence, proof of prior request
Threats, coercion, extortion, impersonation, spoofing, or scam-like conduct	Local police, PNP Anti-Cybercrime Group, NBI Cybercrime Division, or prosecutor’s office depending on the facts	Revised Penal Code, Cybercrime Prevention Act, SIM Registration Act	Screenshots, numbers used, threats, call logs, witness statements
Fraudulent texts, spoofed numbers, or suspected SIM misuse	Your telco’s fraud or spam reporting channel	SIM Registration Act	Message screenshots, sender number, date and time

5. Ask your telco for practical help

Your mobile network provider may not disclose the previous owner because SIM registration information is confidential. But the telco may help by:

Confirming that the SIM is registered to you.
Providing available account or activation information.
Advising how to report spam, scam, or fraudulent calls.
Blocking numbers or helping with harassment reports.
Receiving reports involving spoofed or fraudulent SIM use.

Under the SIM Registration Act, public telecommunications entities must have mechanisms for reporting fraudulent calls and texts and may deactivate SIMs after proper investigation.

6. Escalate if the calls continue

If the collector keeps calling after your written notice, your complaint becomes stronger. Repeated contact after correction is often the practical point where regulators take the issue more seriously because the company can no longer claim it was a simple mistake.

Organize your complaint chronologically:

Date you got the number or started using it.
First call or text from the collector.
First time you told them it was a wrong number.
Written notice sent to the company.
Continued calls or messages after notice.
Any threats, insults, or disclosures to other people.
Harm caused, such as stress, missed work, embarrassment, or fear.

Documents and Evidence That Usually Help

Document or evidence	Why it matters
Call logs	Shows frequency, timing, and repeated contact
SMS/chat screenshots	Shows exact words, threats, company names, and borrower name mentioned
Written wrong-number notice	Proves the collector was informed
Email delivery proof or ticket number	Shows you used an official complaint channel
SIM registration confirmation or telco account proof	Helps show you are the current user
Government ID	Usually needed only for verified company channels or government complaints
Notarized complaint or affidavit	Often needed for formal privacy, police, prosecutor, or regulatory filings
Witness statements	Useful if calls were made to family, employer, neighbors, or co-workers

For Filipinos or foreigners filing from abroad, notarized affidavits, special powers of attorney, or sworn documents may need consular notarization through a Philippine Embassy or Consulate, or apostille processing if the document is issued in a country covered by the Apostille Convention. The DFA Apostille information page explains the apostille process for documents intended for use in the Philippines.

Typical Timelines and Practical Bottlenecks

Step	Practical timeline	Common bottleneck
Blocking the number on your phone	Immediate	Collectors may use new numbers
Sending a wrong-number notice	Same day	Finding the official company email
Company internal correction	Often a few business days, but varies	Poor coordination between lender and collection agency
BSP escalation	After using the provider’s complaint channel	Need for proof that the provider failed to resolve it
SEC complaint	Varies from weeks to months	Identifying the exact lending or financing company
NPC complaint	Varies; formal filing may take time	Notarization, complete evidence, proper complaint form
Police blotter for threats	Usually same day	Need clear screenshots or details of threat
Prosecutor or criminal complaint	Often longer	Requires affidavits and evidence sufficient for preliminary review

A common problem is that the person calling you may only say the app name or collection agency name, not the registered corporate name. Always ask for the full legal name of the creditor and collector. Screenshots of the app, SMS sender, payment instructions, and email footer may help identify the company.

Common Scenarios

“They said I was listed as a reference. Am I liable?”

No. Being listed as a reference is not the same as signing as a co-maker, guarantor, or surety.

A reference may be contacted only for limited, lawful, and proportionate purposes. A collector cannot pressure you to pay, shame you, threaten you, or keep calling after you say the number is wrong or that you did not consent to be contacted.

“They threatened to send police or barangay officers.”

A civil debt is not automatically a criminal case. A collector cannot truthfully threaten arrest unless there is a proper criminal basis and legal process.

Barangay proceedings also do not make you liable for another person’s debt. A barangay blotter may document harassment, but the barangay does not decide whether you owe a loan you never signed.

If the message uses fake legal language, fake warrants, fake subpoenas, or threats of immediate arrest, preserve the evidence and report it to the proper regulator or law enforcement office.

“They call my employer or family.”

This can create privacy and harassment issues, especially if they imply that you owe the money or disclose another person’s debt. Debt collection should not become public shaming.

If they contact your employer, family, or neighbors, document:

Who was contacted.
What was said.
When it happened.
Whether your name was linked to the debt.
Whether the supposed borrower’s debt was disclosed.

“They ask me to send a photo of my ID to remove my number.”

Do not send sensitive ID documents to an unverified caller. Debt collectors sometimes ask for ID “for validation,” but this can expose you to identity theft.

A safer approach is:

Ask for the company’s official complaint or privacy email.
Check the company website or app independently.
Send only the minimum information needed.
Redact unnecessary details when appropriate.
Use government complaint channels if the company refuses to correct the record.

Government agencies may require ID for formal complaints, but that is different from sending your passport, driver’s license, UMID, PhilID, or ACR I-Card to a random collector.

“They keep changing numbers.”

Collectors and scammers often rotate numbers. Keep a running list. Repeated calls from different numbers can still be connected if they mention the same borrower, app, account, payment channel, or collector name.

Your complaint should show the pattern, not just one call.

“I am a foreigner using a Philippine SIM.”

Foreigners using Philippine SIMs also have rights. The SIM Registration Act includes foreign national registration rules, and the Data Privacy Act can apply to personal data processing in the Philippines or by Philippine-linked entities.

If you are abroad, keep screenshots with dates and time zones. For formal sworn documents to be used in the Philippines, you may need consular notarization or apostille, depending on where the document is made.

“I know the previous owner. Should I give their details?”

No, unless you have clear authority or a lawful reason. You are not required to become the collector’s messenger. Giving another person’s address, employer, family details, or contact information may create privacy problems for you.

A safe response is:

“I cannot assist with locating that person. Please remove my number from your records.”

Frequently Asked Questions

Am I responsible for the previous owner’s debt because I now use the same phone number?

No. A mobile number does not transfer debt. You are liable only if you actually borrowed, signed, guaranteed, co-made, or otherwise legally assumed the obligation.

Can a debt collector keep calling after I say it is a wrong number?

They should correct their records and stop contacting you about that debt. If they continue, the repeated calls may support a complaint for unfair debt collection, improper data processing, harassment, or related violations depending on the facts.

Can I simply block the debt collector?

Yes. Blocking is allowed, especially for your peace of mind. But before blocking, save screenshots, call logs, and messages. Evidence is useful if the collector uses new numbers or escalates the harassment.

Should I send my ID to prove I am not the debtor?

Not to a random caller. Ask for the official company channel first. Share only what is necessary and only through verified channels. For government complaints, ID and notarized documents may be required, but that is safer than sending documents to an unknown collector.

Can they call me late at night?

Debt collection rules restrict unreasonable collection contact, and SEC rules treat certain calls before 6:00 a.m. or after 10:00 p.m. as unfair in covered lending and financing collection situations. If you are not the borrower at all, repeated late-night calls after correction are even harder to justify.

What if they say my number was in the borrower’s contact list?

That does not make you liable. The NPC has warned online lenders against using harvested contact lists for harassment. Being in someone’s phonebook is not the same as consenting to collection calls or agreeing to pay their debt.

Can they file a case against me?

A legitimate case must be based on facts showing that you are legally responsible. If you never borrowed, never signed, and are only the new user of a recycled phone number, there is no proper basis to sue you for that debt. Fake threats of court, police, barangay, or NBI action should be documented.

Where should I file a complaint?

For lending companies, financing companies, and many online lending apps, file with the SEC. For banks, credit cards, e-wallets, and BSP-supervised institutions, use the company’s consumer assistance mechanism first, then elevate to the BSP if unresolved. For privacy misuse, file with the National Privacy Commission. For threats, extortion, impersonation, or cyber harassment, report to police, PNP Anti-Cybercrime Group, NBI Cybercrime Division, or the prosecutor’s office.

Can I claim damages if the harassment caused stress or embarrassment?

It may be possible if the facts support a civil, privacy, or regulatory claim. Strong evidence matters: repeated calls, written notice, continued harassment, threats, disclosure to third parties, and proof of actual harm all make the claim stronger.

Key Takeaways

You are not liable for a previous phone number owner’s debt unless you legally agreed to be responsible.
A collector must not treat a recycled mobile number as proof that you are the borrower.
After you say it is a wrong number, continued calls may raise data privacy and unfair collection issues.
Do not send IDs, OTPs, banking details, or personal documents to unverified collectors.
Save screenshots, call logs, messages, and proof that you already asked them to stop.
File with the SEC for lending or financing company harassment, the BSP for BSP-supervised financial institutions, the NPC for privacy violations, and law enforcement for threats or scams.
Your strongest protection is a clear written wrong-number notice plus organized evidence showing the collector continued anyway.