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1. Sender's Information: Full name, address, contact number, and email of the complainant

2. Date: Current date when the letter is written

3. Recipient's Information: Name, title, company name, and complete address of the recipient (store manager, manufacturer, or relevant authority)

4. Subject Line: Clear indication that this is a complaint about expired food products

5. Product Information: Detailed description of the food item including brand name, product name, package size, batch/lot number, and expiration date

6. Purchase Details: Where and when the product was purchased, including store location and date of purchase

7. Description of Issue: Clear explanation of how and when the expired status was discovered

8. Impact Statement: Description of any consequences or potential risks due to the expired product

9. Requested Action: Specific action you are requesting from the recipient (refund, investigation, etc.)

10. Closing: Professional closing statement with expectations for response timeframe

1. Purchase Receipt: Copy of the original purchase receipt or proof of purchase

2. Product Photos: Photos showing the expired product, focusing on the expiration date and any visible spoilage

3. Medical Records: If applicable, copies of medical records or bills related to consumption of expired product

4. Previous Correspondence: Copies of any previous emails, letters, or documentation of conversations regarding the issue