1. Interest Calculation: Include when charging interest on the outstanding amount, showing calculation method and rates

2. Payment Plan Option: Include when willing to accept installment payments or negotiate payment terms

3. Previous Correspondence Reference: Include when there have been previous formal demands or relevant correspondence

4. Without Prejudice Statement: Include when the letter is part of ongoing negotiations and you want to preserve legal rights

5. Customer Account Details: Include for business-to-business demands where relevant account numbers and references are needed

1. Statement of Account: Detailed breakdown of the original amount, any payments made, interest charged, and current total

2. Copy of Original Contract/Invoice: Copy of the document that established the original debt

3. Payment History Log: Chronological record of all payments made and missed payments

4. Previous Correspondence: Copies of relevant previous payment requests or communications

5. Interest Calculation Schedule: Detailed breakdown of how interest has been calculated if applicable