post https://sandbox.checkhq.com/payments//refund
Refunds are possible for failed credit payments associated with funded payrolls.
A refund indicates that a payment will be completed off-platform by the company, and they will now bear the responsibility for paying that employee, usually by a check. The net pay funds collected by Check for this employee will be returned to the company within 1-2 banking days. Additionally, the corresponding parent payroll_item or contractor_payment will have its payment_method set to MANUAL.
We recommend relying on the can_refund field on the Payment object to guide whether a refund is possible.