First Data/Payeezy: Error at checkout: "First Data Gateway: Invalid ta_token provided (invalid.tatoken)"

If you encounter this error, it is likely you are encountering one of two issues. Firstly, be sure that you have contacted First Data to enable TransArmor on your account and that the token entered in Magento matches the token displayed in First Data.

Secondly, if you have confirmed the above you may need to request that your Payeezy and First Data accounts be resynced. This can be done by sending an email with your Merchant ID, DBA (doing business as), and registered developer email to [email protected].