Collection letter samples are available on the About Money and WriteExpress websites. Each site offers several examples for use by business owners, ranging from polite to more demanding.
About Money offers a detailed sample collection letter that directly addresses a person's past due account. In addition to the letter itself, this site provides extensive recommendations on what to include in a collection letter for greatest effectiveness.
WriteExpress provides six separate sets of sample collection letters, including brief payment reminders and notices that aggressive action is being taken. Each sample offers different wording, such as a statement that an envelope is enclosed for use in mailing a payment.