22-character ClientID. Ask Support if you need to specify a SubClientID.

The original 35-character networkID (i.e. the RTP Instruction ID)

Use if you are sending a Request for Return of Funds (regarding the original RTP-Credit Transfer).

Must use request or response

Use if you are responding to a Request for Return of Funds (regarding a received RTP-Credit Transfer).

Must use response or request

Partial Reversal Amount. See how to properly format an amount.

Optional. Use is only allowed if using query string ?response. If omitted, the reversal will be for the original amount.

The fee the participant charges for returning the funds. See how to properly format an amount.

Exclusively compatible with query string response. Optional, omit if no fee is incurred.

See valid Reason Codes for ?request and ?response

The payment-rails used to reimburse the original credit transfer

Acceptable values:

• R: RTP
• A: ACH Payment
• W: FedWire
• C: CHIPS

Exclusively compatible with query string response. Required if reasonCode is ACTC, otherwise omit. If network is R (RTP), a credit transfer will be sent to reimburse the original transaction.

The unique identifier of the transaction used to return the funds. Acceptable values:

• An ACH Trace Number
• A FedWire IMAD
• A CHIPS System Sequence Number (SSN)

Exclusively compatible with query string response. Required if reasonCode is ACTC and network is W, A, or C, omit otherwise.