Originally Posted by
timol
would it be risky to try to check in bags for the late evening ZRH-XXX at the ZRH F check-in, before flying around noon (then no bags) ZRH-EU (to start the EU-ZRH-XXX)?
It is not risky, it is impossible. You cannot check bags at an intermediate station (ZRH) before the first segment of a ticket, to that station, has been flown.