We've multitudinous guests whose payment for Cheques are made by the same account department.Each client has their own account number. Their payments all come in on one check. Each line itemed on Tab is paid against the specified Tab number for the specific account. The issue we're having is that the account department is ever duplicating Tab payments. They're unfit to only pay 1 Tab 1 time. Also they're requesting line credits on the check payments . Learn how to fix and receive too many ach returns in QuickBooks .