I was told by my ticket rep that the original card, the Clear app or "any government-issued" vaccine record, will be accepted. I bring the last one up because your original vax card is next to impossible to replace if lost. I just set up my Clear app so I don't need to bring my card. (Though I do carry an actual-size Xerox copy with me just in case.) My buddy lost his card at a Blue Jays game at Sahlen Field. He couldn't replace the card but does have a State of Massachusetts-issued vaccine record. That supposedly will be accepted. I hope all the card-checkers get the same memo from the Bills so there's no confusion.