We have a customer that has a large number of retail stores.  Althougth they have centralized their accounting (we receive checks that inlcude payments for multiple stores) we do not have them set up in a parent-child relationship  because the individual stores do not want to see statements and aging summaries that includes invoices from other stores.

The problem I currently have is that one store (let's call it store A) overpayed an invoice last month and now we have received a check that includes invoice payments from two other stores (B and C) and a deduction for the credit from the overpayment for Store A.