Someone Is Living in Your Rental Who Isn't on the Lease: What to Do
You find out somebody is living in your rental who isn't on the lease. A boyfriend, a cousin, a friend who was staying "for a couple weeks" four months ago. The first instinct is to go change the locks. Don't. Handled wrong, this costs thousands of dollars and months of lost rent. Here is the order I'd handle it in.
How you actually find out
When you own rentals 2,000 miles away, you don't see this happen. You hear about it. The usual tells:
- A second car that is always in the driveway
- A neighbor mentions someone new
- Maintenance photos show an extra bed or a room full of someone else's things
- Water usage jumps
None of that is proof, and that matters, because the next step is a conversation, not an accusation. Get the facts first: who is it, how long have they been there, and are they getting mail there.
Read your own lease first
Before you call anybody, read the lease. Your options depend almost entirely on what it says. Check:
- Who is listed as an occupant
- Whether there is a guest limit (many leases cap guests at about 14 days in a six-month period)
- The rules on subletting and assignment
- What notice the lease requires for a violation
If your lease doesn't define guests and occupants, fix that on every lease going forward. You can't enforce a rule you never wrote down.
The two things you never do
No self-help. In Michigan, where my units are, and in most states, a landlord can't change the locks, remove belongings or shut off utilities to force someone out. The person can sue you, and the damages can be bigger than the rent you were trying to protect. Removal goes through the court.
Don't take rent from the person who isn't on the lease. Not cash, not an app payment, not a money order with their name on it. Taking their money can blur whether they are a guest or a tenant, and you want that line as clear as possible.
Have the conversation in writing
Have the conversation in writing, even if you also call. Keep it boring: we understand another adult is living in the unit, the lease lists only you, here are the two options, and here is the date we need an answer by. No threats, no adjectives, no guesses about anyone's relationship.
A calm written message gives the tenant a clean way to fix it and starts a paper trail. From far away, the paper trail is everything: the record has to speak for you.
Set a real deadline, such as seven or fourteen days, whatever your lease and your state allow. A deadline without a date is just a suggestion. Keep a copy of everything, and follow any phone call with a short written summary.
Decide: add them or remove them
Option one: add them. This is often the best outcome. A second adult with income and a clean record is another person responsible for the rent. They fill out a full application and go through the same screening as anybody else, then sign a lease addendum.
Option two: they leave. That starts with a written notice that the lease is being violated, with a clear deadline to fix it. Most of the time the guest leaves. When they don't, you are in the court process, and that is where the cost shows up.
When the tenant says they're just visiting
The most common answer is "they're just visiting." Sometimes that is true, so don't argue about the word. Ask the questions that settle it: where do they get their mail, where is their car registered, how many nights a week do they stay, and when are they leaving. A real guest has a real answer to all four. If the answers don't line up, go back to the guest limit and put a date in writing.
Why court is the last resort
It feels like I go through an eviction about once a year across my rentals. Attorney fees have run from a few hundred dollars to well over a thousand, and the attorney is the cheap part. Rent a court says you are owed often never gets paid, and a unit can sit at zero rent for months while a case moves along. The lost months are the big cost.
If you own remotely, set this up now
- An occupant clause and a guest limit in every lease
- A local eviction attorney you have already talked to, so you aren't shopping for one in a crisis
- Someone local who can post a notice on a door
- Move-in photos of every unit
This is what I'd do with my own units, not legal advice. Landlord-tenant law differs by state and sometimes by city, so talk to a local attorney before you act.
Frequently asked questions
Can I change the locks if someone not on the lease won't leave?
No. In Michigan and most states that is illegal self-help. Changing locks, removing belongings or shutting off utilities can expose you to a lawsuit. Removal goes through the court.
Should I accept rent from an unauthorized occupant?
No. Taking rent from someone who isn't on the lease can blur whether they are a guest or a tenant. Only accept rent from the people listed on the lease.
How long can a guest stay before they count as an occupant?
It depends on your lease and your state. Many leases set a guest limit of about 14 days in a six-month period. If your lease has no guest clause, add one going forward.
Is it better to add the person to the lease?
Often, yes. If they pass the same application and screening as any other tenant, a second adult on the lease is another person responsible for the rent.
AI tools used
- Claude (Anthropic): drafted the video script and this write-up from my own notes and records; I checked every claim
- ElevenLabs: the narration voice in the video