my contracts have due dates, they have penalties and interest /late fees. BUT, i don't want late fees or interest, i just want my money on time. here is a letter we enclosed in our billing for late payers, tell me what u think: dear valued customer, just a brief explanation of billing procedures: your bill will be sent on the 15th of each month, for all services provided during that month. payments are due by the last day of the same month. please make every effort to honor our due dates. thank you in advance for your cooperation.