Does Ca. rental laws protect a renters unknown roommate to stay in the premises w/out ID or permission?

I had a new renter move into my home two days earlier than was agreed and moved his so called "cousin" with him without telling me he was moving her in. He now says he doesn't want her on lease. Since he moved in two days early, he skirted by the time we had set aside to sign the rental agreement. They will not give me her SS# or DL# so I can do a background check. He will not sign the lease. I'm a
single parent and I'm freaked. His credit and background checked out okay and he had 2 honorable DD214s. I don't trust him and he also doesn't want to pay anything extra for the extra person. Can someone please tell me what my rights are? I will call Fair Housing on Mon. I was just wondering if I could get any answers over this weekend. Thanks

Since he's refused to sign the lease, you have an understood month-to-month lease. In CA, you can end the understood lease at any time by providing written notice to quit the premises in 30 days. I would suggest providing such notice, but including a provision that he can stay if he signs the lease and has the "cousin" sign the lease as well and provide SSN to do a background check. If, after 30 days he does not move out, you can begin eviction proceedings in court.

I live in missouri therefore the laws may be different in CA.
if no lease or rental agreement was signed and no receipts sgned for monies payed on rent he has no legal rights and you can have him arrested for breaking and entering... UNLESS you gave him a key or he has stayed there long enough to establish residency... though he also has
to prove that you gave him the key and he didn't steal it..=)
Hope I helped sorry for your situation.

He has broken your agreement. If he will not re-negotiate in good faith and has not signed the lease, he has no rights to live there. Throw him out. He has no legal right to be there. I would call the police to help get this resolved ASAP.

I do know that rental properties are required by law, regardless if the person is on the lease or being held financially responsible, to have on file any occupants that are living in a rental space. I was told by my apt manager this is for security reasons and was implemented for the exact situation that you are in. You cant just have some strange person living under your roof, actually it would be 2 people considering the 1st you don't know even though you may have paper work. Good luck, but it sounds like they are "running" you house already.