Legal Question in Landlord & Tenant Law in California

First, it is strange to get a paper like that. If you can consult with an attorney, you should. Be sure to bring the paper and your lease or rental agreement. If you can't afford an attorney. there may be a tenant's right's organization in your area that can help. To specifically answer your question, if your brother and boyfriend are willing to help, they can give you a copy of the most recent utility bill they have gotten, showing their address. There may be other mail that can show their address, but utility bills are particularly good evidence. You can black out account numbers, and any other information that should be kept private.