API – Reverse Payments


Payment reversal in LoanPro will mark a payment as reversed, and will then optionally forward it on to payment processors for voiding. This article explains how to reverse payments through the API, but we also have one explaining how to edit or reverse payments with the UI.

Voiding Payments

To void a payment, send a request to the endpoint

POST Loans({loanid})/VoidPayment({payId})

Replace {loanid} with the id of the associated loan, and {payId} with the id of the payment to reverse.

{payId} is not the display id of the payment, but is the payment system Id. The {payId} can be found by sending a GET request to the url https://loanpro.simnang.com/api/public/api/1/odata.svc/Loans(id=#)/Payments. Substitute the # for the id of the specific loan you are working in.

Below is an example:

POST https://loanpro.simnang.com/api/public/api/1/Loans(209)/VoidPayment(105)


Below is a sample payload:

"reverseReason": "payment.reverse.checkBounce",
"comments": "The check didn't go through with WellsFargo",
"nachaReturnCode": "nacha.returnCode.r05",
"__logOnly": true



reverseReason (required)

This field gives is a collection value that describes the reverse reason.

To get a full list of options, send a GET request:

GET https://loanpro.simnang.com/api/public/api/1/collections(payment.reverse)/items

comments (required)

This is comments describing more about why the reversal happened

nachaReturnCode (optional)

  • This specifies a NACHA return code to be sent to the payment processor; upon receiving a code the processor may or may not perform an action – that action is not determined by LoanPro
  • If not specified, no NACHA return code will be sent to the payment processor

__logOnly (optional)

  • If set to “true”, then no information will be forwarded to payment processors – including NACHA return codes
  • If set to “false”, voiding information will be forwarded to payment processors
  • Defaults to “false” if not specified

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