View the list of Sample Business Letters Five Day Demand for Payment Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Five Day Demand for Payment Dear Our accounting department has turned your past due account over to me hoping that I could persuade you to bring it current prior to forwarding your file to our legal department. When our firm extends credit to an individual such as yourself, it bases its decision on that applicant's previous credit history and ability to pay. When you requested credit from us, you met all of these criteria. Today, however, your account has reached the critical stage. You can avoid any additional costs if you mail your check in the amount of (amount) I must hear from you within five days.