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1. Sender's Details: Complete company information including name, address, and contact details as per German business letter standards

2. Recipient's Details: Complete supplier information including company name, specific department/contact person if known, and address

3. Date and Reference Numbers: Current date and any relevant reference numbers (order numbers, invoice numbers, customer numbers)

4. Subject Line: Clear, specific subject line indicating the nature of the complaint (Betreff)

5. Opening Salutation: Formal German business greeting with the recipient's name or title

6. Issue Description: Clear, factual description of the problem including specific details, dates, and quantities

7. Impact Statement: Description of how the issue has affected your business operations

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

9. Specific Request: Clear statement of what action you expect from the supplier

10. Deadline: Reasonable timeframe for expected response or resolution

11. Closing: Professional closing statement and signature block as per German business standards

1. Photographic Evidence: Photos documenting the issue (e.g., damaged goods, quality problems)

2. Original Order Documentation: Copies of purchase orders, order confirmations, and related correspondence

3. Delivery Documentation: Delivery notes, shipping documents, or receipt confirmations

4. Invoice Copies: Relevant invoices and payment records

5. Quality Reports: Any technical reports or quality inspection documents related to the issue

6. Communication Log: Chronological record of previous communications regarding the issue