Most of my conductors on the Capitol Corridor trains now use the seat check printers. They scan the ticket and the seat check with the Station Code (and some other information such as origin, date, res #, etc...) are printed out. It makes interpreting the stubs much less interesting than before!

For those still using the traditional seat checks I've noticed either the destination written on it or the orientation of the seat check mixed with various folds to denote the destination.