Document number (cheque) duplication on payment journals

Hi there,

My client has just gone live on Dynamics NAV.

They have a problem with duplication of cheque numbers. They are entering the cheque number in the document number field, but had just realised that they had duplicated some of the payments. They are expecting a warning from NAV when they have used a document number before. They can not use the number series as the cheque numbers are not in sequence. They want functionality similar to the Vendor Invoice No. field on Purchase Invoices. Could you please advise me.

Thanks for your help.

If DocNo is set up to be manually entered, standart Navision does not check for duplicates. You need a modification - ask your implementing partner for help.

Thank you for your reply. I will inform my customer about the development.