In a standard payment flow, the payable amount from your payment request is authorized and then captured. For some businesses (for example petrol/gas stations, car rentals, hotels, activity providers etc.) there is a need to adjust the amount before the actual payment is captured. With pre-authorization flow, you can increase or decrease the authorized amount at a later stage, and then capture the payment as needed. Pre-authorization can significantly reduce fraud, processing costs, and improve overall customer satisfaction.
Payment flow with pre-authorization.