Charges one scheduled payment now, instead of on its scheduled date.

A scheduled payment is a planned future collection on an instalment, subscription or metered order. It shows as one billing event in the order's payment timeline.

• You can execute a payment that is scheduled, failed (soft declined) or rejected (hard declined). Any other status returns 403.
• It charges the payment even if it has used all its automatic retries. Use it to retry a declined payment by hand.
• A declined charge still returns 200. Read result to tell success from declined.
• Sending the same request twice doesn't charge the customer twice.
• A 502 means the charge failed partway, so it isn't known whether the card was charged. Show the scheduled payment to check its state before you try again.
• Send no body.

A successful charge can't be undone here. To return the money, refund the payment.