Passengers may have promo codes or other campaigns for their rides. These campaigns can work with both cash and card as a payment method.
In case of a cash ride, when a discounted price is charged to the passenger, you will get a notification about this as shown in the screenshot below.
The app will also show you the amount charged to the passenger as well as the amount you will earn.
Note: Please don’t forget that when the app shows the passenger is paying by card, there is no need to accept a cash payment.