I rarely eat out, but when i do , yes i sometimes would send it back, depending, once i got toasted sandwiches which were burn't and i tried to eat them, but couldn't so i sent them back, and i specifically ordered a bagel without cranberry sauce, and it came with it on, as i cannot eat that, i sent it back, joking with the waiter i hope it does not come back with spit on it, as there had just been a big write up in the paper about that, i was a tad worried, but all was fine.

We don't tip in NZ, however our wages are higher, so i expect good service just the same.