I am currently renting a duplex and the house is at the tail end of changing hands to a new owner. The new owner is using it as an investment property so we will be staying and he will rent out the other side. We have not spoken to him yet; only the broker. He sent us a letter, throughhis lawer, notifying us of a rent increase (which is fine). However, is it legal for the new owner to be asking us to sign a rent increase letter if he doesn't officially own the house yet?