-snip-
I get what you are saying that on 2fa wallet, that he will not be able to spend but it is not what he is looking for.
Since he didn't specified the wallet type and nobody provided instructions to create a watching-only version of a 2fa wallet, I've posted it just in case.
if his wallet is 2fa, it's exactly what he's looking for.
BTW, the wallet that'll be created will be "
2of3, watching only" and not "
2fa".