eCheck Credits and Refunds {#echeck-txnrprocess-creditsrefunds}
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You may issue credits and refunds for eCheck transactions. The following requirements apply:

* The original eCheck transaction must have been processed through the Payment Gateway.
* eCheck refunds must be submitted with the transaction ID of the original eCheck transaction.
* The amount of the refund must be less than or equal to the amount of the original transaction.
* The sum of multiple refunds submitted against the original transaction must be less than or equal to the amount of the original transaction.
* Your eCheck settlement sub-account must contain available funds (funds that are no longer in the holding period) to cover the refund. If your account does not contain sufficient funds, the refund is rejected.