Format Error
What it means
The transaction request was malformed and could not be processed by the issuer.
Why it happens
One or more fields in the authorization message were formatted incorrectly or were missing.
If you’re the cardholder
This is a technical issue on the merchant or gateway side; try again later or contact the merchant.
If you’re the merchant
Review the message fields and formatting in your integration and correct the request before resubmitting.