@Codeberg SNCB Europe, when you buy a ticket, will give it to you in one of two forms:

- A ticket on the phone, in their app.
- A paper ticket, delivered in PDF form.

YOU MUST PRINT THE PDF ONE ON ACTUAL PAPER OR IT IS NOT VALID. YOU CANNOT SHOW IT ON A SCREEN. VERBODEN. INTERDIT. FORBIDDEN. IT WILL BE REJECTED. NEVER. NIMMER. NYET. NO. NON. NEE.

Both have the exact same 2D barcode on them.

Digital signatures have been a thing for decades now.

Why?

(Edit: Wait... I'm talking to the Codeberg social media account? Huh.)