For catch and release, no problem here with the "hook and hand-off", but on catch and kill, I think you need to get your own fish. The client is paying for the idea of fighting a fish, so if you will release them, fine. I just don't feel good about the kill part if you didn't do it yourself. Why not just go to the store?

I have regularly let my son reel in fish that were caught on either rod, but we release most (90%) of the trout we catch.
He has caught two sockeyes, what a long process that was. A four year old with the rod in the holder the whole time, but he got them in. We did keep them.

A similarity to this is the party fishing done on charter boats where the little old lady in the pink rainsuit catches everyone's second fish. I have also caught other people's fish on charters, 37 tuna in two days but I only kept 11, but I was paying right along side the others. There have been times when I have handed my rod off to another as well.

I would rather have the guide "guide" me, not hook my fish. Just my thoughts with no judgements made against others who choose to do otherwise.Andy