Originally Posted by
ToGo
No different from the DB ticket language, then. From the subsequent rule:
D.1.3.2.3. Ein in anderem Format und anderer Farbe ausgedrucktes Online Ticket kann von unseren Zugbegleitern technisch nicht eingescannt und akzeptiert werden.
Printing on A4 is purely for technical reasons. If you print it on letter at "actual size", the ticket will be slightly cropped, but the barcode will be the proper size and scan correctly. There is nothing in the rules about rejecting it simply because it's on the wrong size paper.