Hi Mavis,

Nothing is wrong with Payables - it allows duplicate check numbers. You will need to Reverse (not Void) one of them if indeed one of the duplicates was done in error.

Bank Rec has a specific setting in the company profile to disallow duplicate check numbers. If you like this behaviour then leave the option enabled and then you will have to deal with the undesired duplicate check in AP. If you want to allow the duplicate check in BankRec then you have to disable the option in the Company profile to disallow duplicates.