You get and error message below at checkout when you use pass URL parameters to hide certain fields on the checkout form .

When we pass URL parameters to hide certain fields on the , these fields are then not available on the form and therefore when a payment txn is created, EziDebit tries to look for these records and gives out error message. If you want to hide the details, you can create custom CSS to hide the details on the page, but will be still available for EziDebit to read and allowing the transaction to go though.