Error Code

Error Code	API	Reason
400	Token	Same authcode in the body is being re-used.
Authcode error - missing, invalid, expired, revoked.
401	Token	No security header given
Invalid App ID used. Digital service is not registered with Verify
The timestamp of server is not synchronised. Check timestamp of server.
The value of the nonce in the authorisation header was deemed to be repeated. Check that the nonce is not re-used
Ensure HTTP 'Authorization' header to be 'PKI_SIGN'
Person	No security header given (HTTP 'Authorization' header)
Invalid App ID used. Digital service is not registered with Verify
The timestamp of server is not synchronised. Check timestamp of server.
The value of the nonce in the authorisation header was deemed to be repeated. Check that the nonce is not re-used
Ensure HTTP 'Authorization' header to be 'PKI_SIGN'
The requested UIN/FIN does not match the UIN/FIN of the person who logged in
Requested attributes do not match the attributes consented by person
403	Token	Incorrect API URL used.
Person	Incorrect API URL used.
Digital service is not registered with Verify.
Request contains attributes not allowable for the digital service.
404	Person	Missing Myinfo profile.
500	Token	Unexpected error. Check response body for actual error.
Person	Unexpected error. Check response body for actual error.