Advice to your friend - better gamble online then. Because the casino will always calculate the results and there would never be such cases when he has thrown away ticket that won.
Your friend is the best client for casino, because he does not care about money. For me it sounds ridiculous when someone spends money on something he does not understand. I would never do that. For example I have little understanding what is Asian handicap. I dont even plan to find it out. I would never place bets using them.
This would have prevented him from throwing away his winning tickets. That is precisely one of the benefits of online betting platforms. When you bet online, you are credited whether or not you understand the option as long as there is a winning. There are times when a gambler makes a mistake with his selection. That is, he chose another option in the hopes of a different outcome, but he won by mistake, and only after logging into his online account did he notice he had been credited. This would have also saved the OP's friend.
However, individuals do not expect certain things in life, which is why some actions are carried out in ignorance. Thus, my suggestion is that, especially as a newbie, you take a closer look at the option before placing a bet. This has been made easier for gamblers because some bookies include an icon that explains each option, making it clear what a bet option means.