Originally Posted by
Lurch
If you found a wallet with $200, would you try to find the owner?
That is an inappropriate question. Of course one would. Of course the wallet would likely have the owner's address in it. Otherwise, I'd give the wallet to the police, who have the resources to find the owner.
In the original poster's (OP) case, s/he does not have any contact information, so s/he
cannot try to find the guest with who rightfully earned the frequent stay points.
The OP's obligation only extends to (1) contacting the hotel (which has been done) and (2) contacting the frequent stay program. Beyond that, what more can be done?