Officials urge people not to post images of their cards online As immunizations continue to be administered into millions of arms across the country, cybercriminals are looking to cash in on fake vaccination cards, supported by those who don’t want the shot. North Carolina Attorney General Josh Stein, along with dozens of other state attorneys general, called on OfferUp, an online mobile marketplace, to prevent fraudulent or blank COVID-19 vaccine cards from being sold on its platform, warning them that people could be using their platforms to sell blank and fraudulently completed COVID vaccine cards with the CDC logo on them.