Forum Post: RE: Editing Documents in accounts payable after they have been posted. Is this possible?

Just to clarify what Rick wrote, when a voucher is released but still un-paid, you can modify a small handful of fields, including Invoice Number (my demo version is SL2011 SP1, with no customizations on the Document Maintenance screen. I can change (or add) the Invoice Number, Invoice Date, Terms and Pay Date/Due Date fields. Again, this is if the voucher is still open & un-paid: Once the voucher is paid, you really can't (and shouldn't!) change anything: Hope this helps.