Hello how may I help you? can you tell me my account balance? Sure, first I need your library ID number. 323423 You currently have $10 in outstanding late fees. can I pay those fees online? You can make payments via credit card or check. will the fee go up if I don't pay now? There is no interest rate for late fees. great. where do I mail that check to? Checks can be mailed to the Detroit Public Library, 123 Wallaby Way, Detriot MI, 48201. Thank you.