When redeeming MyPoints to Hilton HHonors points, how long does it take for the points to post, generally? Is it instant, like with VehiclesOnline, or does it take a while? Or (hopefully not) do I receive a certificate in the mail?

Also, if I try to convert points from MyPoints to a relative's HH account (same last name, different first name), is it known to work? I hope that this would not be bending the rules too much.

Thanks in advance for your advice.