免密支付 用英语怎么说？

password-free payment

「免密支付」的英文是 password-free payment，指小额交易无需密码即可扣款。

I enabled password-free payment for my transit card so I can tap and ride the subway without entering a PIN.

我为公交卡开通了免密支付，这样坐地铁时刷卡即可，无需输入密码。

Many bike-sharing apps use password-free payment to automatically deduct the fare after each ride.

许多共享单车应用使用免密支付，在每次骑行后自动扣费。