Short answer: an estoppel certificate is a signed statement from a tenant confirming the basic facts of its lease: the rent, the term, the security deposit, and whether anyone is in default. Buyers and lenders require them before a property is sold or refinanced, because the certificate binds the tenant to those facts afterward.
Estoppel certificates usually arrive with a deadline and a landlord-drafted form, which is why tenants often have a commercial lease attorney review them before signing.
The name comes from estoppel, the principle that stops a party from later asserting something that contradicts what they previously confirmed. That is exactly the point: once a tenant signs, it generally cannot claim later that the rent was lower, that the landlord promised free months, or that the landlord was in default at the time.
What an Estoppel Certificate Confirms
| What the certificate confirms | Why the lender or buyer cares |
|---|---|
| Lease start and end dates, and any renewal options | Confirms how long the income stream runs and what the tenant can extend |
| Current base rent, escalations and additional rent | Verifies the income the buyer is paying for |
| Security deposit amount and form | The buyer takes over the obligation to return it |
| That the lease is unmodified, or a list of every amendment | Side letters and oral agreements are a common surprise |
| That neither party is in default | Protects against inherited disputes |
| Prepaid rent and outstanding landlord obligations | Unfinished build-out or unpaid allowances become the buyer’s problem |
When Estoppel Certificates Are Requested
- Sale of the building. The buyer verifies the rent roll it is buying rather than relying on the seller’s summary.
- Refinancing. The lender confirms the income supporting the loan.
- Assignment of the lease or sale of a tenant’s business. The incoming tenant confirms where things stand.
Your Lease Probably Requires You to Sign One
Most commercial leases include an estoppel clause requiring the tenant to deliver a signed certificate within a set period, often 10 to 20 days of the landlord’s request. Many leases go further and provide that if the tenant fails to respond in time, the statements in the landlord’s form are deemed accurate, or that the landlord may sign on the tenant’s behalf. Refusing to sign is therefore usually a lease default, not a negotiating tactic.
What to Check Before You Sign
- Every number. Base rent, escalation dates, additional rent, the security deposit and the expiration date should match your lease exactly.
- Amendments and side letters. List all of them. If a free-rent period or an unpaid improvement allowance is not disclosed, you may lose it.
- Outstanding landlord obligations. If the landlord still owes you a build-out, a repair or an allowance, say so in the certificate.
- Default language. Do not confirm that no default exists if you have an open dispute or unanswered complaint.
- Extra promises. Landlord forms sometimes slip in waivers or new obligations. An estoppel certificate should confirm facts, not amend your lease.
What a Wrong Number Costs
An estoppel binds you because the buyer or lender relies on it. A worked example shows how quickly that matters.
Your lease gives four months of free rent and you have used two. Base rent is $9,000 a month. The landlord sends an estoppel stating that all concessions have been used and no landlord obligations remain outstanding, and you sign without checking it against your file. The building sells a month later.
- The two remaining free months: gone, because the buyer purchased relying on your confirmation. That is $18,000.
- The $35,000 of unfinished landlord work you had been chasing: gone for the same reason.
- Your security deposit, if the certificate understates it, is worth the difference on the day you leave.
None of this requires bad faith by anyone. These certificates are usually drafted from the landlord's records, which are frequently out of date on concessions and punch list items. Checking one against your own file takes an hour, and it is the only moment when a correction is free.
Estoppel Certificate vs. SNDA
They often arrive together but do different jobs. An estoppel certificate confirms the current facts of the lease. A subordination, non-disturbance and attornment agreement (SNDA) governs what happens if the lender forecloses: the tenant agrees its lease is subordinate to the mortgage, the lender agrees not to disturb the tenant’s possession if the tenant is not in default, and the tenant agrees to recognize the lender or buyer as its new landlord.
For Landlords
Send the request early, use a form tied to the actual lease terms, and track the response deadline, because a missing certificate can hold up a closing. If a tenant returns a marked-up certificate disclosing an unpaid allowance or an open dispute, resolve it before closing rather than leaving the buyer to discover it in diligence.
Asked to sign an estoppel certificate? Our commercial lease attorneys check the certificate against your lease and your concession history before it becomes binding, and handle the response when the landlord is working from stale records.
Frequently Asked Questions
What is an estoppel certificate?
It is a signed statement from a tenant confirming the key facts of its lease, including rent, term, security deposit and whether either party is in default. Buyers and lenders rely on it when a property is sold or refinanced.
Do I have to sign an estoppel certificate?
Almost always. Most commercial leases require the tenant to deliver one within a set period after the landlord asks, and many provide that the landlord’s version is deemed accurate if the tenant does not respond in time. Refusing can be a lease default.
Can I make changes to an estoppel certificate?
Yes. You should correct anything inaccurate and disclose amendments, unpaid allowances, free rent or open disputes. What you should not do is accept new obligations or waivers, since the certificate confirms facts rather than amending the lease.
What happens if an estoppel certificate is wrong?
You are generally bound by what you signed. If the certificate understates your rights, for example by omitting a renewal option or an unpaid improvement allowance, you may be unable to enforce them against the new owner.
What is the difference between an estoppel certificate and an SNDA?
An estoppel certificate confirms current lease facts. An SNDA sets the relationship with the lender if the mortgage is foreclosed: subordination of the lease, non-disturbance of the tenant, and recognition of the new owner as landlord.
Asked to Sign an Estoppel Certificate?
Our commercial lease attorneys review estoppel certificates and SNDAs for landlords and tenants. Schedule a free consultation.
Contact Us Onlineor call (212) 920-5989