检票

i m NOT sure that "validate a ticket" means 检票. 检票 means someone checks your ticket. for example, when u r sitting in a train, which has been moving, an inspector will check everyone's ticket. "validate a ticket" is what we must do with a machine before we take a train. we put our tickets into a little machine and this machine gonna print something on our tickets. if we dont do this, we CAN'T take any train even if we have a ticket. anyway, this is how we take a train in france. in china, as i know, there is not a machine to validate a ticket like this. so there is no "validate a ticket" in china. we say : 打票 if we want to say "validate a ticket"

验票：check a ticket validate a ticket: 使 票 生效 We should make the ticket stamped so as to validate it. 我们需要将这张票盖章，才能使它生效。

检票

检jian3 票piao4. used in subway and railway stations.