Our file is pretty much a mess in several aspects, but in my A/R aging reports, it shows several customers who have negative balances. However, when I go to write those off as bad debts, I get a message that there are no open invoices for those particular customers. However when I go to the transaction history for the individual customers, I can find overdue invoices, however the amounts don't match (from overdue invoice to A/R aging report balances). Where are these balances coming from, and how do I get it all cleared up? These are balances from previous years, and there are probably 30 customers with these negative balances.