Transaction Types

PAYMENT Transactions Are instant & synchronous and are typically associated with a credit card transaction such as Visa or Mastercard.

PREAUTH/SETTLEMENT Are asynchronous transactions. They are used to authorise a transaction that doesn't immediately get settled (PREAUTH). These transactions can be settled either manually or using a postback from the gateway side (SETTLEMENT). Examples are ACH, Bank deposits, wire transfers.

AUTH/CAPTURE Are the same as a PREAUTH/SETTLEMENT but updated to avoid using the phrase SETTLEMENT, which can cause confusion about the payment status.

CREDIT Transactions Are transactions in which funds are credited to a recipient's credit card. They are asynchronous transactions

VOID Transactions Are used to void a transaction. If the transaction amount has not been settled /transferred to the merchant's account, there is a chance the transaction can be voided. This typically has lower processing fees than a REFUND. Not all gateways support VOID transactions.

REFUND Transactions Once a transaction has been settled / transferred to the merchant account, the transaction can no longer be VOID, so any reversals must be done via a REFUND transaction.

Each Transaction Type has a matching set of of workflow and Integration methods. They are mapped out below.

Transaction Type	Synchronous / Asynchronous / Redirect	Integration Methods
Payment	Synchronous / Redirect	Rest, Soap, Form Redirect / Submit
Preauth / Settlement	Asynchronous / Redirect	Rest, Soap, Form Redirect / Submit
Auth / Capture	Asynchronous / Redirect	Rest, Soap, Form Redirect / Submit
Credit	Asynchronous	Rest, Soap
Void	Synchronous	Soap
Refund	Synchronous	Soap