Using multiple diamond suite upgrades for multiple rooms?
 

If I want to book 4 hotel rooms for my family stay, can I use all 4 of the diamond suite upgrades for the rooms or is it only for my personal room?

Using multiple diamond suite upgrades for multiple rooms?
 

You can book all 4 as long as the rooms are in your name. I just did it !

Can you change the name later if another person would be paying for one of the other rooms?

I've changed names, and Diamond Membership #'s after check-in, but you need to do it before check out. Ask candidly at the front desk, and they'll ensure and double check that the stay and points are credited to whom you want credited.

Print out an invoice and ensure each room is separately billed, with correct information and HP membership#.