# 支付和预授权的区别

## 区别

* 预授权: 是指发卡机构或其代理机构在特约商户扣款前，确认许可冻结额度的交易。**预授权会占用卡片的信用额度，此时还未真实从客户信用卡中扣除金额仅冻结**。如果没有在预授权的**限定时间**内进行**预授权完成，**则该预授权将会被取消
* 支付：支付**立即**从客户信用卡中扣除金额。从业务角度上 **支付 = 预授权+预授权完成**

## 预授权时间

根据MCC判定 7-31天不等，通常是7天，具体可以询问UseePay运营


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