A Trademark Infringement Warning Letter is a crucial legal instrument used when a trademark owner discovers unauthorized use of their protected mark in the Philippines. This document serves as the first formal step in trademark enforcement, typically issued before initiating court proceedings. It must comply with Philippine intellectual property laws, particularly the Intellectual Property Code (Republic Act No. 8293), and should be drafted considering local legal requirements and customs. The letter establishes the sender's trademark rights, documents the alleged infringement, and demands specific remedial actions. It's particularly important in the Philippine context where amicable resolution is encouraged before pursuing litigation. The document should be comprehensive enough to demonstrate serious intent while leaving room for negotiation, as Philippine courts generally look favorably upon parties who attempt to resolve disputes privately before seeking judicial intervention.

1. Header and Date: Sender's details, recipient's details, and date of the letter

2. Subject Line: Clear indication that this is a trademark infringement warning regarding specific trademark(s)

3. Trademark Ownership Declaration: Statement of ownership of the trademark(s), including registration numbers and dates

4. Description of Infringement: Detailed description of the observed trademark infringement, including specific instances and dates

5. Legal Rights Statement: Clear statement of legal rights under Philippine trademark law and applicable international treaties

6. Evidence Reference: Reference to evidence of infringement (with details provided in attachments)

7. Demands: Clear list of required actions from the recipient with specific deadlines

8. Consequences Statement: Statement of potential legal actions if demands are not met

9. Response Timeline: Specific deadline for response to the letter

10. Closing and Signature: Professional closing, signature block, and attorney/firm details if applicable