JohnnyB

[sterile ferry]

You should use this endpoint, rather that /update: https://stripe.com/docs/api/payment_intents/increment_authorization

[signal totem]

Ok thanks @sterile ferry - This is exactly what I need, much appreciated.

[sterile ferry]

Although that may only work for increasing the amount

I think what you need to do is actually only capture the amount you want, and then the rest is automatically released/refunded: https://stripe.com/docs/payments/place-a-hold-on-a-payment-method#capture-funds:~:text=To capture less,the remaining amount.

[signal totem]

Ok thanks @sterile ferry