TriFact365 recognises duplicate invoices when they are uploaded.
The combination of supplier/customer and invoice number is checked. This check is automatically executed when an invoice has the status Check, and an error message will be shown in the Check screen.
![Printscreen of the message that is shown when a duplicate invoice is detected: "An invoice is already present in the Archive or on the Confirmation status with the invoice number for this relation"](https://tf365websi-516020d6ffc950329fae-endpoint.azureedge.net/blobtf365websi5cbfa6e024/wp-content/uploads/2023/03/DuplicateInvoice.png)