1. Previous Communications: Reference to prior attempts to resolve the matter, used when there have been previous unsuccessful collection attempts

2. Interest Calculation: Detailed breakdown of how interest has been calculated, used when claiming interest on the outstanding amount

3. Without Prejudice: This marking if the letter includes any settlement offers or negotiations

4. Settlement Options: Proposed payment plans or settlement terms, used when willing to negotiate terms

5. Third Party Rights: Reference to any third party interests or rights, used when other parties have interests in the claim

6. Reservation of Rights: Statement preserving other legal rights, used in complex cases with multiple potential claims

1. Original Agreement: Copy of the contract or agreement that forms the basis of the claim

2. Statement of Account: Detailed breakdown of the amounts owed, including any interest calculations

3. Payment History: Record of any partial payments made and remaining balance

4. Previous Correspondence: Copies of relevant previous communications regarding the debt

5. Supporting Documents: Any additional evidence supporting the claim (invoices, delivery notes, etc.)