In the Philippines, the relationship between a debtor and a creditor is primarily governed by civil law. However, when debt collection practices cross the line from professional follow-ups to harassment, intimidation, or shaming, several legal protections and remedies become available to the debtor.

Philippine law strictly prohibits "unfair collection practices" and provides both administrative and criminal avenues for redress.

1. SEC Memorandum Circular No. 18 (Series of 2019)

The Securities and Exchange Commission (SEC) issued this circular specifically to curb the abusive practices of financing and lending companies. It defines and prohibits "unfair collection practices," which include:

Threats of Violence: Using or threatening to use physical violence to harm the person, reputation, or property of the debtor.
Obscene/Profane Language: Using insults or foul language to coerce payment.
Public Shaming: Disclosing or threatening to disclose the debtor's name and personal circumstances to the public (e.g., posting on social media or informing the debtor's employer/neighbors).
False Representation: Falsely claiming to be a lawyer, a court representative, or a government agency to intimidate the debtor.
Harassing Contacts: Contacting the debtor at unreasonable hours (before 6:00 AM or after 10:00 PM), unless the debt is past due for more than 60 days and the debtor has consented to such timing.

Remedy: Debtors can file a formal complaint with the SEC’s Enforcement and Investor Protection Department. If found guilty, the lending company may face fines ranging from ₱25,000 to ₱1,000,000, and potentially the revocation of their Certificate of Authority to operate.

2. BSP Circular No. 454 (Series of 2004)

For debts involving banks and credit card companies, the Bangko Sentral ng Pilipinas (BSP) provides similar protections. Under the Rules and Regulations Governing Credit Card Operations, banks and their collection agents are prohibited from using "unfair, unreasonable, or abusive" methods.

Remedy: A complaint can be filed with the BSP Consumer Protection and Market Conduct Office (CPMCO). The BSP can mediate the dispute or sanction the bank for non-compliance with consumer protection standards.

3. Republic Act No. 10173: The Data Privacy Act of 2012

A common tactic in digital lending (especially through mobile apps) is "contact list harvesting," where the lender accesses the debtor's phone contacts and sends mass messages about the debt. This is a severe violation of the Data Privacy Act.

Remedy: The debtor can file a complaint with the National Privacy Commission (NPC). Unauthorized processing of personal information and processing for unauthorized purposes are criminal offenses punishable by imprisonment and heavy fines.

4. Criminal Liabilities under the Revised Penal Code

If the harassment is severe, the collector or the agency may be held criminally liable under the Revised Penal Code (RPC) or the Cybercrime Prevention Act of 2012:

Unjust Vexation (Art. 287): Any human conduct which, although not causing physical injury, unjustly annoys or irritates an innocent person.
Grave or Light Threats (Art. 282-283): If the collector threatens the debtor with a wrong amounting to a crime (e.g., "I will kill you if you don't pay").
Libel or Cyber Libel: If the collector publishes false or malicious statements about the debtor online to shame them.
Grave Coercion (Art. 286): If the collector prevents the debtor from doing something lawful or compels them to do something against their will (like surrendering property without a court order) through violence or intimidation.

5. Essential Legal Principles to Remember

"No Person Shall Be Imprisoned for Debt"

Under Article III, Section 20 of the 1987 Philippine Constitution, no person shall be imprisoned for debt or non-payment of a poll tax. While you cannot go to jail for the debt itself, you can be imprisoned if the non-payment involves a crime, such as Estafa (fraud) or a violation of Bouncing Checks Law (B.P. 22).

Small Claims Court

If a creditor wants to legally collect a debt between ₱1.00 and ₱1,000,000 (excluding interests and costs), they must go through Small Claims Court. This is a summary procedure where lawyers are not allowed to represent parties in the hearing. It is the proper, legal way to demand payment rather than through harassment.

Summary of Actions for Debtors

Document Everything: Keep screenshots of messages, record phone calls (informed recording laws apply), and save emails.
Send a Cease and Desist: Formally notify the collector in writing that their behavior is harassing and that you will take legal action if it continues.
File Administrative Complaints: Reach out to the SEC (for lending apps/financing firms), BSP (for banks), or NPC (for data privacy leaks).
Police Assistance: For physical threats or persistent unjust vexation, report the incident to the nearest police station to Blotter the event or file a case with the Prosecutor’s Office.