This sounds simple but I'm sure it's not - My girlfriend was recently near homelessness, when a couple she was friends with, asked if she would like to move into the extra bedroom they have in the house they are renting in Portland, Oregon. (The true landlord had no knowledge of her moving in.) She agreed to pay them $800 a month to cover her room and a share of the utilities. (The rent for the entire house is $975 a month total.) During the first month, she realized that it was a toxic environment, with the couple constantly fighting (including physical violence,) and not respecting her privacy boundaries. (ie: just walking into her room without knocking, or they would use the bathroom without closing the door.) After a few months she finally saved up enough money to move out - which she did. (She even gave them $150 when she left on the 1st of December hoping that would help appease them.) Now she is being sued for a one month past rent ($800 for Dec.) because she did not give the couple 30 days notice when she moved. (She did not give them notice because of the fear of reprisal.) My question is: Since she was not on the rental agreement, & there was no agreement between them as to how long she would stay, or that she would need to tell them in advance if she was moving, (not to mention the unsafe environment) - do the couple have a legitimate case? And I guess also – Would she be considered a legal tenant, even though she had no dealings with the landlord whatsoever? Thanks for any help!