Sadly that wouldn't work
You can't pass that liability on to anyone, with or without a carbon copy.
The person who applied the product remains liable whatever you do
im a gas fitter when there's anything wrong with a job we have to fill a document in that leaves a copy for the user, 1 for me and 1 for the company's records so if they go killing them selfs after not taking our advice I'm covered by law as they've signed to say they understand didn't know if you's could do the same and cover your backs?I was more interested in the honey bees thought they should be a government initiativ