Payment types

Payment type	Request parameter	Description
Debit	`DB`	Debits the customer account and credits the merchant account.
Credit	`CD`	Credits the customer account and debits the merchant account.
Refund	`RF`	Credits the customer account referencing a prior debit or capture transaction. Can be partial or full.
Reversal	`RV`	Reverses an already processed preauthorisation transaction.
Chargeback	`CB`	A negative charge on the merchant account, generally triggered by a customer returning a DB or RB transaction.
Rebill	`RB`	Debits the customer account with a reference to a prior debit transaction. Generally used to rebill an already-processed debit transaction for a chargeback or to add more products to an already-processed order.
Preauthorisation	`PA`	A stand-alone authorisation that triggers optional risk management and validation. A capture referencing the preauthorisation confirms the payment.
Capture	`CP`	Captures a preauthorised amount.
Registration	`RG`	Registers a card which you can then charge on a recurring basis or for one-click payments using the registration token.
Deregistration	`DR`	Deregisters a card so that you can no longer charge it on a recurring basis or for one-click payments using the registration token.
Confirmation	`CF`	Confirms a token.

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For details on when to use a refund and when to use a reversal, see the support knowledge base.