Yes. When an invoice is uploaded, Zenvoices checks whether the invoice already exists in the Zenvoices archive. If a duplicate is detected, the message ‘Invoice number is not unique’ is displayed in the Bookings overview under: Bookings / Incomplete and To review.
Within the booking screen, you can view and open the corresponding bookings by clicking on the invoice number.
In addition, when exporting the booking to the accounting software, a check is performed to verify whether the invoice already exists. If this is the case, an error message will be displayed.
Important for Exact Online users:
When exporting to Exact Online, an additional validation is performed based on Invoice number, Invoice amount anf Invoice date. If an invoice with the same invoice number, amount and invoice date has already been booked in Exact Online, an error message will be shown. If one of these three elements differs, the booking can still be exported successfully.