Aged Receivables (sometimes called Accounts Receivable or Trade Debtors) is the list of sales invoices that were unpaid at a point in time. The list will always have a date. For example Aged Receivables on 31st March shows invoices that were unpaid at that date (even if they were paid after).

Aged Payables (sometimes called Accounts Payable or Trade Creditors) is a similar list showing unpaid bills at a date. For example Aged Payables on 31st March shows bills that were unpaid at that date (even if they were paid after).