1. Previous Communication: Include if there have been prior attempts to resolve the issue

2. Urgency Statement: Include if the matter requires immediate attention due to financial hardship or other pressing circumstances

3. Legal Rights Reference: Include if you need to reference specific consumer protection or banking laws

4. Impact Statement: Include if the double payment has caused significant financial or other hardship

5. Alternative Resolution Options: Include if you're willing to accept alternative forms of resolution

1. Bank Statements: Copies of bank statements showing both payments

2. Payment Receipts: Copies of receipts or confirmation emails for both payments

3. Transaction History: Screenshot or printout of account transaction history showing the double payment

4. Previous Correspondence: Copies of any previous emails or letters regarding this issue

5. Proof of Purchase: Original invoice or purchase agreement showing the correct amount due