Some landlords have gotten permission from the City of Milwaukee to allow more than 3 unrelated individuals to live in a signal rental unit. There are only a few landlords that have this license. Do not believe a landlord that says they have a license; you should always ask to see the company’s certificate from the city.
If you are found to be in violation of the occupancy ordinance, living with 3 or more roommates (including yourself) you could be evicted. If anyone is not on the lease, they are most at risk and will also be unable to receive renter’s insurance.