Once again #DeutscheBahn, if "screenshots" are a problem in your anti-fraud concept, you don't actually have an anti-fraud concept: what you have is an anti-customer concept.
A screenshot of a digital code is a valid way to show a digital code.
A printout of a digital code is a valid way to show a digital code.
All else is infringing on our right to digital self-determination.
Stop making us pay the price of your incompetence!