Gov regarding any questions or enquiries related to account, debt, or payment options. We'll walk you through how to write a demand letter for payment with samples you can emulate in your own business.How to File a Claim. What should a request for payment letter include? We've created ready-to-use collection letter templates. Read on below to find out what every letter should say in order to collect payment as soon as possible. Recover unpaid wages in New York. A Debt Recovery Letter is the first reminder you should send to a debtor asking them to pay money owed. A debt collection letter informs clients about their unpaid bills. New York City residents can use this letter to dispute a debt, to verify a debt under NYC law, and to tell a collector to stop contacting them.