There is talk of the paper version of proof of vaccination being too open to forgery, but it strikes me that people attempting to prove two jabs via their smartphones could possibly be using a borrowed phone in the belief that those looking at the image would not have the necessary time to be able to verify their identity. I'm thinking of those mass events, such as concerts, football matches, etc., where phones appear to be glanced at only fleetingly in order not to hold up queues.
I do worry about someone questioning the veracity of my paper version, perhaps abroad, where I could land up in big trouble.
