1. Previous Correspondence: Reference to any previous attempts to resolve the matter, used when there has been prior communication

2. Interest Calculation Details: Detailed breakdown of interest calculations, used for complex claims or when interest forms a significant part of the claim

3. Without Prejudice: Statement that the letter is without prejudice to any other rights, used when preserving other legal rights

4. Settlement Offer: Proposed settlement terms, used when willing to negotiate or accept alternative payment arrangements

5. Power of Attorney: Reference to authority to act, used when writing on behalf of another party

1. Invoice Copies: Copies of relevant invoices or payment demands

2. Contract Documentation: Copies of contracts or agreements forming the basis of the claim

3. Correspondence History: Copies of relevant previous correspondence

4. Proof of Delivery/Service: Documentation proving delivery of goods or services

5. Interest Calculations: Detailed calculations of interest claims

6. Timeline of Events: Chronological listing of relevant events and dates