If you didn't pay rent previously, most likely you would legally be considered a guest, not a tenant. A guest may only stay as long as the property owner let's him/her stay, and at any time--regardless of how long you have been there--the property owner can ask you to leave; or can say you must leave unless you agree to apy a certain amount. If you don't go, they could bring an "ejectment" action in the courts to remove you (this will likely take anywhere from a few weeks to a few months, depending in part on how crowded/busy your local courts are). So while they can't compel you to pay in that they could not sue you for the money, they can give you the ultimatum of leave or pay, and you can decide whether to go or pay.