There's 2 potential issues. The first is familiarity. Many Americans have never had a passport, and have no idea what they look like. You can train around th

There's 2 potential issues. The first is familiarity. Many Americans have never had a passport, and have no idea what they look like. You can train around that. The second is that driver's licenses are scannable, so you don't have to argue with the CC company about whether or not your worker correctly validated the passport. I also would not be surprised if bars occasionally turn down passports as ID, because they don't have anyone around that's comfortable saying it's real. I've often seen bartenders get the manager to check a passport or an uncommon out of state ID (if they don't have a scanner).