Have photocopied on previous visit but didn't on our last visit as we only had vouchers for our 10 day tickets which we exchanged in Downtown Disney on our way from the airport.
one of our kids only picked up 5 of our 6 tickets from a fast pass machine in Animal Kingdom. Once i realised this I went back to the ride to look for it.
i couldn't see it & asked a CM for help. Always do this as I found out that each ride has a hidden store of lost/left behind tickets.
Unfortunately ours wasn't there.
We then went to Guest relations which is by the enterance to the park. They immediately cancelled our lost ticket & issue d us with a new one. No cost & no bother just great service.