Void a payment

post https://gateway.stage.bill.com/connect/v3/payments/{paymentId}/void

Void an existing payment.

Void a bill payment that has started processing and cannot be canceled (with POST /v3/payments/{paymentId}/cancel). You can attempt to void payments made both with BILL (online) and outside BILL (offline).

Void a payment made with BILL (online)

In your /POST /v3/payments/{paymentId}/void request:

Set paymentId as the BILL-generated ID of the payment. The value begins with stp.
Set type as the void payment request type
Set reason as the reason for voiding the payment

See Void bill payments and what to expect in the BILL Help Center to learn about the BILL void payment process and timing in the production environment.