The Inbox app provides detailed error reporting to help you handle files that fail validation. If you are missing an invoice that was supposed to enter your account, you should check the Inbox app to see if the document is there with an Error status. Files with the Processed status enter your account without any issues, while others will result in errors that prevent them from being fully accepted. This update allows you to identify exactly what caused the issue, whether the file was received via Peppol, email, or manual upload, so you can take the necessary steps to fix it.
Rejected status
The Inbox app now flags invalid documents with a Rejected status, in addition to the existing Error and Processed statuses. Use Rejected as the first signal that a document never made it into your account and needs your attention. From there, follow the steps below to inspect the error and take action.
How to access error details
Go to your Inbox.
Locate a document with an Error status.
Double-click the document. Banqup opens it for processing if it's still actionable, or shows its Activity Log if the document is already in Error state.
Alternatively, you can click the three dots (⋮) in the Actions column, then select View details.
For uploads that result in an error or are rejected (for example, due to an invalid file syntax or a duplicate invoice number), the upload notification now shows a redirect icon next to the file name. Click the icon to jump directly to the document's read-only view or back to the Inbox so you can investigate further without searching for the file.
Reviewing an invalid document
When you open an invalid document from your Inbox (through a double-click on it), a log of all the events related to that file appears. Look for the error entry to see exactly why it occurred.
Common error messages you may encounter include:
Duplicate document number: an invoice with this number already exists in your space.
Some values in your file have formatting issues (length, invalid characters, etc.): one or more values in the structured file don't match the expected format. The message now points you to the field to fix.
Invalid checksum: the file may be corrupted or wasn't uploaded correctly.
Invalid email address format: an email address inside the document isn't correctly written.
Wrong electronic address: the document is addressed to an identifier that doesn't match your account.
Attachment type is not supported: you tried to include a file format that Banqup cannot process.
No preview available. Unsupported file type: the file isn't a PDF, so the in-app preview is unavailable. The document is still saved and processed.
This file type is not supported: the main document file is in a format that Banqup doesn't recognise.
The file does not belong to your space: the document metadata suggests it's intended for a different Banqup space.
Peppol validation errors
You may also see Peppol validation errors. These occur because the document does not meet the EN 16931 standard required for electronic invoicing.
If the error contains a specific code (like BR-DEC-19 or UBL-DT-01), it means the document violates a specific rule of the Peppol model.
If you don't understand how to solve a specific error code, copy it and send it to our AI assistant Eva (via the messenger in the bottom right of this page) and ask her for a solution.
Important notes
Read-only view: You can open these documents in a separate view to see the errors highlighted, but please note this is a read-only view and data cannot be edited directly from Inbox.
Action needed: Most validation errors must be fixed by the person who issued the document. If you're importing a PDF, you can fix the validation errors yourself. The imported document will hold the "Awaiting validation" status until you validate it, meaning adding all the information required to meet the Peppol EN 16931 standard. → Read more about validating documents
For invoices you received (did not import yourself), you can use the Download button to inspect the file locally before contacting your supplier for a corrected version. You cannot fix it yourself.
The Try Again option no longer appears on system errors where a simple retry would not resolve the underlying file issue (for example, a malformed XML structure). In those cases, fix the source file and re-upload it instead.
FAQ
Can I fix an e-invoice I received from a supplier?
No. You cannot edit e-invoices you receive from a supplier. The Inbox view is read-only for received e-invoices. If the document is rejected, you need to contact the supplier and ask them to issue a corrected version.
What's the difference between Error, Rejected, and Processed status?
Processed: the document entered your account successfully.
Error: there's something wrong with the file, for example the format is not supported.
Rejected: the document never entered your account because it's not compliant with the EN 16931 standard.
Can I fix a PDF I imported myself?
Yes. PDFs you upload yourself hold the Awaiting validation status until you complete them. You can add the information required to meet the Peppol EN 16931 standard and validate the document from your side. This only applies to documents you imported, not to e-invoices you received from a supplier.