Note: I'm a landlord not a lawyer. I have had some experience with Sec 8 tenants.
Most obvious: notify them in writing that they are violating their lease terms and if the others don't leave within x days, you will start eviction process. Even with Sec 8, the lease still holds like w/anyone else, and people not on the lease living there is a violation that gives you the right to evict unless they remedy the situation. If you want to risk losing your rent payment from the agency, send a copy to the agency. If they fear losing all benefits like their free health care, low cost child care, etc. they may comply ... for awhile.
You could call the government agency in question (the Housing Authority for your county, for instance) and report them. They will be called in for an investigation and may or will lose their eligibility and you will lose your rental payment from the agency as a result after a month or two, but you can at least get them out and you can probably keep their deposit.
IME, when investigated they lie to the agency about the person(s) moving out, or just temporarily show a different address for a month, and then move them right back in when they get their benefits restored or resolved.
You have to decide if you like dealing with this kind of people or not because they are into manipulating the system.
If there are enough people that it's violating county occupancy laws, you could be cited, something else to consider.
Management or landlord. If no action - contact your local Health Department.
if a landlord bugs my apartment, is that an invasion of privacy?
The landlord
Visit the apartment or contact the landlord.
No, typically a person cannot live in an apartment without being on the lease. It is important to check the terms of the lease agreement and discuss with the landlord before allowing someone to live in the apartment.
This means the apartment is allowing you to still live there (perhaps you settled and paid the arrears but not before the Landlord obtained a Judgment or writ of execution against you but chose not to kick you out)
Usually the landlord, but there's no law about it.
If you have a lease your landlord would have to take you to court to have you kicked out of the apartment. If you are a month to month tenant then the landlord can request that you vacate with 30 days notice.
You can usually tell by the upkeep of the apartment building. As far as your landlord's character try talking to some of the other tenants.
Follow the landlord's proper procedures for requesting such transfer. There may be a waiting list for that apartment.
Protect your rights as a landlord or renter: use a rental or lease agreement to outline renter and landlord responsibilities for apartment maintenance.Click here to fill out the Apartment Maintenance Responsibilitiesform
What a landlord verifies is completely up to the landlord