Partner API: new Refund and Amendment endpoints

Plans change after a customer is approved. They add an item, swap a product or return something. Until now, handling those changes meant getting in touch with Snap.

Two new Partner API endpoints let you handle the most common after-sale changes yourself, straight from your system: Refund and Amendment.

POST /v1/partner/refund requests a refund for an application. Send your partnerId, partnerRetailerId and partnerAppId to identify the application, plus the amount to refund and a reason.

POST /v1/partner/amendment changes an application after approval. Send the new invoiceId, the updated loanDetails and the new basket, and Snap returns a decision on the amended application. The customer receives a variation notice explaining the change to their agreement.

Use Amendment when the basket changes

If the customer changes what they’re buying, send an amendment with the new basket and loan details. Snap makes a new decision on the amended amount, so the agreement always matches the order. As with new applications, loanAmount must be at least £250, and totalCashPrice must equal loanAmount plus deposit.

Use Refund when money goes back to the customer

If goods are returned or the customer is owed money, request a refund for that amount, with a short reason your team and ours will recognise later.

Both endpoints use the same token as the rest of the Partner API, and both return a message confirming what Snap did.

Optional fields on applications

Bank sort code, bank account number and monthlyRentMortgage are now optional on POST /v1/partner/applications, so you can create applications even when you don’t collect that information up front.

Clearer responses

Declined responses now include the application ID, so you can always link a response to a Snap application.

1. Request a token as usual with your client credentials.
2. Try both endpoints from the reference with Try it out, or with the Postman collection.
3. Add them to your after-sale flows.