FWIW, I know you are right: there are international standards. I've tried to look for them in prior years without success. Interestingly, my search of a few minutes turned up this thread.
Keep in mind, if you find them, you may have to provide the paying bank with a copy and their reaction may still be disbelief. This is an ancient technique and there are fewer practitioners with every passing year. Offering to send a check for collection is a business decision, not a responsibility...