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1. Sender's Details: Full name, address, contact information, and any relevant customer account numbers

2. Date: Current date when the letter is written

3. Recipient's Details: Company name, department, full address, and if possible, specific contact person

4. Subject Line: Clear indication that this is a complaint about an expired product

5. Product Details: Specific information about the product including name, brand, batch number, manufacturing date, expiry date

6. Purchase Information: Where and when the product was purchased, including receipt details

7. Description of Issue: Clear explanation of how and when the expiry issue was discovered

8. Impact Statement: Description of any consequences or potential harm caused by the expired product

9. Specific Request: Clear statement of what resolution is being sought (refund, replacement, compensation)

10. Closing Statement: Professional closing with expected timeframe for response

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

2. Product Photos: Clear photographs showing the product and its expiry date

3. Package Labels: Images or copies of relevant product packaging showing batch numbers and dates

4. Previous Correspondence: Copies of any previous emails or communication regarding the issue

5. Medical Records: If applicable, any medical documents related to health issues caused by the expired product