post https://api.paynearme-sandbox.com/json-api/cancel_payment
Use the pnm_payment_identifier to cancel a payment. Only unprocessed payments can be canceled. For ACH payments, this is before the daily batch transfer to the bank. For cards, the cutoff time is based on the card processing network.
Wallet Payments in SandboxWallet payments made via PayPal and Venmo cannot be cancelled, reversed, or refunded in Sandbox.