As a waiter, the only time I ever ask for an ID is if you look under around 25. At that point, if you hand me a rectangular card that is at least laminated, I just give it back to you and serve you alcohol. I don't give a fuck what country it's from or whether it's fake or not. I mostly do this so I don't get fucked by an undercover cop (which does happen in restaurants), and even if he does try to fuck me still if I didn't card, I can say "oh well you looked over 30 and that's my restaurant's policy."
ON THE OTHER HAND, if some kid tried to bribe me to serve him alcohol, I would outright say fuck no, and probably get someone else to serve him. Either it's an undercover cop trying to entrap me or the kid isn't worth my time and patience, so I'd get someone else to serve them. Not worth my service, whether or not the "bribe" is left underneath a water glass lol.