This incident has been resolved.

We are continuing to monitor for any further issues.

This issue is solved for Belgium. All double scans are removed and the scans won't be returned multiple times. For Spain and Germany the scans also won't be returned multiple times. We are still investigating the double returned scans for both countries.

We are continuing to monitor for any further issues.

Your scans could be returned multiple times. You can check this via purchase > invoices > purchase > overview. If you already entered 1 scan, there others scans will automatically get the status 'Invoice number already exists'. Please do not reject these double scans. We are working hard to fix this for you. Our apologies for the inconvenience.