 If a friend bills you $4 for a favor, are they really a friend? Surprise Venmo requests are souring relationships. Oh, jeez. So you go out and you grab a latte and you say, I got it. Then an hour later, they get you a bill for $12 or $8 or whatever it is. I guess that's a thing now. Why would you say, I got it, and then bill them later?