I almost want to say this is BS to scare people into not using fake cards. Because unless their card was extremely fake looking or they were complete retards, there’s really no way for them to know. Health info is private; it’s not like the government official could just call the vaccination site and get their info. At least they’re not supposed to be able to do that. And as of now there is no national registry. It is only state registries, and not every state participates. And even within the states that have a registry, not all doctors participate.