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1. Sender's Details: Full name, address, and contact information of the complainant

2. Recipient's Details: Company name, address, and department/person responsible for warranty claims

3. Date: Current date of the letter

4. Subject Line: Clear indication that this is a warranty claim with reference numbers if available

5. Product Information: Detailed description of the product including model number, serial number, and date of purchase

6. Problem Description: Clear and detailed explanation of the defect or issue with the product

7. Warranty Details: Reference to specific warranty terms and how the claim falls within the warranty period

8. Previous Communications: Summary of any previous attempts to resolve the issue

9. Specific Request: Clear statement of the desired resolution (repair, replacement, or refund)

10. Closing: Professional closing with expected timeframe for response and contact information

1. Proof of Purchase: Copy of receipt, invoice, or other proof of purchase documentation

2. Warranty Certificate: Copy of the original warranty card or certificate

3. Product Documentation: Photographs or videos showing the defect, product manual, or other relevant product documentation

4. Communication Records: Copies of previous emails, letters, or records of communication regarding the issue

5. Technical Reports: Any technical assessment reports or expert opinions about the defect