Authorization
Authorization is a way to reserve an amount on your customer's EP account. For
example, if your customer purchases goods in the amount of $100, you can send the
authorization to the EPP for $100 and reserve that amount.
You are not actually charging the account, just reserving a specific quantity. For example, if your customer has a $500 available credit before your reservation, then they can have $400 available after your reservation. An authorization amount is valid for a certain period of time. After this time expires, your reservation on your customer's account expires. In this example, your customer's available credit returns to $500.