I was curious about this because a passenger recently inquired about it and I could not find the option on the app, nor could they. They tipped me through the app using their credit card but if this is an option, how can I show future passengers how to access it?
No, you can't do that. I already inquired about it. They said that this credit is for trips only and it tells the person who has the credit on the app that it can't be used for tips.