Talk to your landlord. I expect your fiancee will need to put in an application, and if she is approved, she'll probably have to sign the lease.Adding anyone to the lease will be a matter of the contract language and the permission of the landlord. Probably not unless your lease allows it OR doesn't mention it. The lease will control. You can do an amendment and just state that effective XXXXXX date, the girlfriend is being added to the existing lease contract that expires on XXXXXX date. To add a spouse to your voucher, you must contact the PHA office that manages your voucher and provide the personal information of your spouse. The major federal laws that affect all landlords and property managers are the Fair Housing Act and the Fair Credit Reporting Act. Response: No, the Landlord cannot refuse to add your spouse and child to your lease based on your spouse's credit.