A capture transaction can be submitted against a successful authorization for equal or less value than the original Authorization transaction.

The following parameters are available to process a capture.

parameter	description	required
mid	the Merchant ID (MID) assigned by `{user.company_name}` or your merchant service provider (MSP)	Yes
reference_id	A reference id that will be echo'd back in the message response.	No
amount	the total amount to capture - you can capture less then but never more then the original Authorization	Yes
orderid	unique merchant order tracking number for the original authorization	No
transaction_id	the payment gateway unique transaction_id for the original authorization	Yes

Link to details on related response codes.