To attorn means to formally acknowledge a new owner of your rental property as your landlord, so the lease you already signed stays in force under the new ownership. If you are asking what “attorn” means because the word has turned up in your lease or in paperwork tied to a sale or foreclosure, that is the whole concept: ownership of the building changes, you recognize the buyer or lender as the party you now deal with, and the rent, term, and other lease provisions keep running on their original tracks.
The practical point is continuity. Attornment creates a direct legal relationship between you and the new owner without anyone having to redraft the lease. The buyer gets the right to collect rent and enforce the lease; you keep the protections the lease gives you.
When Attornment Shows Up
Two situations put the word in front of tenants.
The first is an ordinary sale. The new owner sends a notice identifying themselves and tells you where to send rent. If your lease mentions “successors and assigns,” you are already contractually bound to treat the buyer as your landlord. These transitions usually go quietly because the buyer wanted the lease when they bought the building.
The second is foreclosure, and it is messier. When a lender takes a property because the landlord stopped paying the mortgage, your lease may or may not survive, depending on the timing, the type of property, and whether anyone signed paperwork in advance addressing exactly that scenario. The documents and the federal law described below are what control the outcome.
What the Attornment Clause in Your Lease Does
Most commercial leases bury an attornment clause in the boilerplate near the end. Search the document for “attornment,” “successors and assigns,” or “subordination.” The clause typically does three things:
- Defines a successor landlord as anyone who acquires the property by sale, foreclosure, or other legal transfer.
- Confirms that rent, maintenance, renewal options, and the rest of the lease carry forward unchanged.
- Either requires you to sign a written acknowledgment on request, or states that the attornment is “self-operative.”
A self-operative clause takes effect automatically the moment ownership changes. No separate signature is needed, and your cooperation is not required for the attornment to be legally real. A clause that requires written acknowledgment is better for the tenant, because the request itself is a natural moment to verify who the new owner is and confirm nothing in the lease has been altered before you sign.
SNDAs: Attornment in the Loan Context
In commercial real estate, lenders routinely require a three-way contract before they close a mortgage loan on the building you occupy. It is called a Subordination, Non-Disturbance, and Attornment agreement, or SNDA, and it is signed by the tenant, the landlord, and the lender. Each piece handles a different problem:
- Subordination: you agree that the lender’s mortgage ranks ahead of your lease. If the property is sold at foreclosure, the lender gets paid first.
- Non-disturbance: the lender promises not to evict you if you are paying rent and following the lease, even if the lender ends up owning the property.
- Attornment: you agree to recognize the lender, or whoever buys at a foreclosure sale, as your new landlord and keep performing under the lease.
The non-disturbance piece is your real protection. Without it, a foreclosing lender could in theory wipe out the lease and clear the building. The attornment piece is the trade: you keep occupancy, and in exchange you accept whoever ends up holding the deed. Expect to see an SNDA any time your landlord takes out or refinances a mortgage.
Estoppel Certificates You May Be Asked to Sign at the Same Time
When a sale or refinancing is underway, the request for an SNDA or attornment acknowledgment often arrives alongside an estoppel certificate. The estoppel certificate is your written statement of the current status of the lease, and once you sign it, the buyer or lender can rely on it. If you confirm wrong facts, you can be stuck with those facts.
Before signing, check each item against your lease and your records:
- The current rent, including any recent increases.
- The exact lease expiration date.
- Every renewal or expansion option.
- Any money the landlord still owes you, such as a security deposit or an improvement reimbursement.
- Any build-out or repair work the landlord promised and has not finished.
The estoppel certificate locks in the lease facts; the attornment clause then carries that locked-in lease over to the new owner.
If You Rent a Home and the Property Is Foreclosed
Residential tenants have a federal protection that commercial tenants do not. The Protecting Tenants at Foreclosure Act requires any new owner who takes a property through foreclosure on a federally related mortgage to honor existing leases and give meaningful notice before displacing tenants.1Office of the Law Revision Counsel. 12 USC 5220 – Assistance to Homeowners
Two core guarantees:
- At least 90 days’ notice before you have to vacate, whether you have a written lease or rent month-to-month.
- If you have a bona fide lease signed before the foreclosure notice, you can stay through the end of the term. The exception: a buyer who plans to live in the property as a primary residence still has to give you 90 days, but does not have to let you ride out the full lease.
A lease is “bona fide” if it came from an arm’s-length transaction, you are not the borrower or a close family member of the borrower, and the rent is not substantially below market, unless it is subsidized through a government program. State and local laws can give you longer notice or stronger rights; the federal rule is a floor.
What Happens If You Refuse to Attorn
If your lease contains an attornment clause and you refuse to recognize the new owner, you are in breach. The new landlord can treat the refusal as a default and move toward eviction or sue to compel compliance. If the clause is self-operative, your refusal does not change the legal reality anyway: the new owner can collect rent and enforce the lease whether you acknowledge them or not.
When no attornment clause exists, a new owner generally cannot force you to attorn. In practice, most tenants attorn voluntarily once they confirm the sale is legitimate, because they still occupy the property, still owe rent to someone, and the new owner holds the deed. The fight rarely benefits either side.
Reading your attornment clause before a transfer is pending is the better path. If the clause gives you a chance to sign an acknowledgment, use that moment to verify the new owner’s identity, confirm the lease terms are intact, and raise any outstanding issues before you commit to the new relationship.