"Experts have said it can be difficult to spot fake vaccination cards, because they often appear identical to the real deal.
There’s also no surefire method for verifying someone’s vaccine status: The card is often the only real proof that someone has gotten the shot." 
The CDC does not keep a record of people who have received a COVID-19 vaccine.
It appears it may be very difficult, or no way, to PROVE that a person has actually been vaccinated for COVID-19.
Gnarls.
