WIth the "Reject duplicate" invoice number setup in the accounts payable parameters, we expected to forbide the creation of two pending invoices with the same number.

But it is not the current behaviour while one of this two invoices is not posted but on going into the workflow

So I suggested to extend the feature "Prohibit submission to workflow when the invoice number already exists on a posted invoice", to un-posted invoice also,

Thank you for taking into account this idea and voting for it,

Bests regards