Originally Posted by
satz
Are you aware that one can be added as a guest on someone's reservation without violating T&C?
Yes, but when you check in claiming the other person will be arriving at the hotel when you know the person isn't, both you and the other person have violated the T&Cs. When you do this scheme to get certs, when you receive the certs, you are not only violating the T&Cs, but you are committing fraud, and you are stealing.