Update an authorised amount

Increases or decreases the authorised payment amount and returns a unique reference for this request. You get the outcome of the request asynchronously, in an [**AUTHORISATION_ADJUSTMENT** webhook](https://docs.adyen.com/development-resources/webhooks/understand-notifications#event-codes). You can only update authorised amounts that have not yet been [captured](https://docs.adyen.com/api-explorer/#/CheckoutService/latest/post/payments/{paymentPspReference}/captures). The amount you specify ...