Change the authorised amount

Allows you to increase or decrease the authorised amount after the initial authorisation has taken place. This functionality enables for example tipping, improving the chances your authorisation will be valid, or charging the shopper when they have already left the merchant premises. > This endpoint is part of our [classic API integration](https://docs.adyen.com/online-payments/classic-integrations/api-integration-ecommerce). > If you have a [newer integration](https://docs.adyen.com/online-...