Pinpad devices need to be registered with Global Payments in order to process debit transactions. If you receive any of the following error messages when processing a debit transaction through the Worldpay/Vantiv Canadian platform:
"Transaction Not Complete - Packet Error from PinPad"
"Transaction Not Complete - No Keys, No Data"
"Transaction not Complete - System Unavailable" when implementing a key change
These errors indicate that the serial number from the terminal device has not been registered with the Global Payments processing network. Contact Worldpay/Vantiv support to have your device registered with Global Payments to resolve this error.