Status 401 means Sovos found a structural problem and transmitted nothing. Fix every error listed in the notification before you resubmit.

SCICloudStatusCode 401 means Sovos identified a technical or structural error before the invoice reached the PEPPOL network. Nothing was transmitted.

Check the SCIInternalValidationStatusCode entries in the notification for specific error details. Fix all identified problems and resubmit.

Common causes:

• Missing required PEPPOL BIS Billing 3.0 fields.

• Invalid VAT category code or VAT rate.

• Amount totals that don't balance (for example, LineExtensionAmount doesn't match the sum of line amounts).

• Mapping.InputSchema scope value incorrect — must be UBLInvoice for Slovakia.

• Buyer participant identifier format incorrect — must be {schemeID}:{IČO}.