Keep the signed file intact
Changing signed vehicle data can invalidate the signature. Use the original signed output and check the reported signature profile, certificate information and cryptographic result. Structural checks alone do not establish cryptographic validity. If data needs correction, return to the source system and produce a newly signed file.
Before you continue
- Keep an unchanged copy of the signed XML.
- Review certificate, reference and signature-position messages.
- Resolve a failed signature check before attempting submission.
Does SignECOC sign an already signed file again?
The signed-file submission flow is intended to check and send an existing signed file. It does not require a second signing step. Submission still depends on account permissions, credits and channel availability.