A retail centre is being refinanced. The lender wants a signed estoppel certificate from every tenant within three weeks. The property manager pre-fills fourteen certificates from the lease files and sends them out.

Eleven come back signed. Three come back marked up:

None of these is a tenant being difficult. Each is a place where the landlord's records and the tenant's reality had drifted apart, and nobody noticed until a third party asked both sides to put the facts in writing.

That's what an estoppel certificate really is: a test of your lease records, run on someone else's deadline.

What an estoppel certificate is

A tenant estoppel certificate is a signed statement in which the tenant confirms the key facts of its lease. Buyers and lenders typically require one during a sale or refinance, to verify the income they are about to own or lend against. Once signed, an estoppel can have significant legal effect: depending on the certificate, the lease and applicable law, the tenant may be prevented, or "estopped," from later asserting facts that contradict what it certified.

That's why buyers and lenders care. A seller's rent roll is the seller's claim. An estoppel is the tenant's confirmation of it.

It is often requested alongside an SNDA, a subordination, non-disturbance and attornment agreement, but the two do different jobs. An estoppel looks backward and confirms what is true about the lease now. An SNDA looks forward and sets rules for the future: it subordinates the lease to the lender's mortgage, protects the tenant from eviction on foreclosure, and requires the tenant to recognise the lender as landlord.

The four questions every estoppel answers

Certificates vary in length and wording, and the exact questions depend on the lease, the form and the transaction. Most commercial certificates, though, come back to the same four questions, and they're the right four to ask of any lease before the request arrives.

1. What is the lease?
The documents that make it up: the original lease, every amendment, and any side letter or agreement that changes it. A certificate that lists the wrong documents misdescribes the deal from the first line.

2. What is owed, and what's been paid?
Current rent, the date rent is paid through, the security deposit held, and any rent paid in advance.

3. What has been promised?
Commencement and expiry dates, renewal and expansion options, rights of first refusal, tenant improvement allowances, and landlord work still to be done.

4. What is in dispute?
Whether either party is in default, and whether the tenant claims any offset, credit or defence against rent.

Commercial certificates run longer than residential ones because commercial leases do. They cover operating expenses, percentage rent, expansion and renewal options, tenant improvement allowances and exclusive-use rights.

Why the lease clause matters more than the certificate

Whether a tenant has to sign at all, and how fast, depends on the lease.

A tenant is generally not required to sign an estoppel certificate unless the lease requires it. Most commercial leases do require one, commonly within a short period such as 10 to 15 days of the landlord's request. Many also provide that if the tenant refuses or delays, the landlord may complete the form as the tenant's attorney-in-fact, or that the tenant's failure to respond means it accepts the facts stated.

Two practical consequences follow.

• Read the clause before you send the request. It tells you the response period, what the certificate may ask, and what happens if the tenant doesn't respond. Quote it in your cover letter.

• Don't use the certificate to add obligations. Tenants are advised to watch for landlords, buyers or lenders inserting terms that aren't in the lease, because a tenant who signs without checking risks being held to them. An estoppel confirms the lease; it isn't an amendment. If the deal needs a change to the lease, that belongs in a lease amendment, signed as one.

Where lenders make it a requirement

For some financings, the estoppel isn't optional for the landlord either. Fannie Mae's multifamily guide, for example, requires a Tenant Estoppel Certificate (Form 6413) for each "Material Commercial Lease," broadly one producing 5% or more of the property's annual effective gross income. The lender's list of required certificates and the deadline for delivering them should be on your calendar the day the financing is agreed, not the week before closing.

Estoppels for associations are a different document

The same name is used for a different document in community associations, and the two shouldn't be confused.

In Florida, for example, a homeowners' association must issue an estoppel certificate within 10 business days of a written or electronic request from a parcel owner, a mortgagee or their designee. It certifies the owner's account with the association rather than a lease. The association waives the right to collect amounts above those stated in the certificate from anyone who relies on it in good faith. If you manage associations, those certificates run on statutory deadlines and forms, not on a lease clause.

Preparing the certificate: the landlord's side

Much of the preparation risk sits in the draft the landlord sends. A well-prepared certificate is pre-filled from records the tenant will recognise. A badly prepared one generates the markups in our opening example.

1. Assemble the complete lease file. The original lease, every amendment in order, side letters, option exercise notices, assignment consents and any rent concession agreements. If a document isn't in the file, find out why before you certify what the lease says. Our guide to lease abstraction at scale covers keeping these fields current.

2. Reconcile the money before you state it. Pull the tenant ledger and confirm the current rent, the paid-through date, any prepaid rent and the security deposit held against your deposit register. The restaurant and salon errors in our example were both reconciliation problems, not drafting problems. See our guides to rent roll reconciliation and security deposit accounting.

3. Recalculate the dates and options. Confirm the expiry date and every option window against the latest amendment, not the original lease. Our guide to tracking critical lease dates covers why dates drift.

4. List outstanding obligations honestly. Unpaid TI allowances, landlord work not completed, and any dispute you know about. A certificate that hides a known dispute doesn't make it go away; it just moves the argument to after closing.

5. Send it with the lease clause and a clear deadline. State the response period the lease allows, the date it runs from, and who to contact with corrections.

6. Track every response. Log the date sent, the date due, signed or returned with changes, and the follow-up.

7. Feed corrections back into your records. If a tenant's markup is right, the certificate isn't the only thing to fix. Correct the ledger, the abstract and the critical dates too, so the next request doesn't find the same gap.

Estoppel request template

This is an illustrative operational example, not a standard or legally sufficient estoppel form. The actual certificate should follow the lease, the transaction's requirements, any buyer's or lender's required form, and applicable law. Many lenders and buyers supply their own. Have counsel review it before use.

[LANDLORD / MANAGER LETTERHEAD]

[Date]

[Tenant legal name]

[Notice address under the lease]

Re: Request for Estoppel Certificate

Premises: [Address, suite]

Lease dated [date], as amended by [list amendments]

Under Section [X] of the Lease, we request that you complete,

sign and return the enclosed estoppel certificate within

[number] days of receipt, as the Lease provides.

The certificate is requested in connection with [the sale /

refinancing] of the property. [Buyer / Lender] will rely on it.

Please review each statement carefully. If any statement is

incorrect or incomplete, mark the correction on the certificate

and return it, or contact [name, email, phone] before the deadline.

Sincerely,

[Name, title]

-------------------------------------------------------------

TENANT ESTOPPEL CERTIFICATE

The undersigned Tenant certifies to [Landlord], [Buyer/Lender],

and their successors and assigns, as of [date]:

1. Lease documents: The Lease consists only of: [list original

lease, amendments, side letters]. There are no other

agreements between Landlord and Tenant regarding the Premises.

2. The Lease is in full force and effect.

3. Commencement date: [date]. Expiration date: [date].

4. Current monthly base rent: $[amount].

Additional rent / recoveries: $[amount or description].

5. Rent has been paid through: [date]. No rent has been paid

more than [one month] in advance, except: [details].

6. Security deposit held by Landlord: $[amount].

7. Options: [renewal, expansion, termination, first refusal,

with terms], or "None".

8. Landlord obligations outstanding (allowances, work): [details],

or "None".

9. To Tenant's knowledge, neither Landlord nor Tenant is in

default under the Lease, except: [details].

10. Tenant claims no offsets, credits or defences against rent,

except: [details].

TENANT: ______________________ Name/Title: ____________

Date: ______________

What goes wrong

In rough order of how often it causes a markup or a delay:

• Missing documents. The side letter or email agreement that never reached the lease file. Item 1 of the certificate then states something that isn't true.

• Paid-through dates taken from the rent roll, not the ledger. Prepayments and unapplied receipts make the two disagree.

• Deposit figures that don't match the register. Top-ups on expansion or partial applications that were never recorded.

• Options stated from the original lease. An amendment that changed the term also moved or replaced the option.

• Starting too late. The lease allows the tenant its full response period, and a tenant who returns a markup on the last day leaves no time to resolve it before closing.

Where RIOO fits

An estoppel request is only as fast as the time it takes to answer four questions about each lease from records you trust. When the lease documents, ledger, deposit and dates live in separate places, every certificate becomes a reconstruction.

RIOO's contracts and renewals keeps lease agreements and renewal documents in central storage, alongside digital lease creation and scheduled rent changes, so the documents an estoppel draws on sit in one place. 

Pick one commercial lease in your portfolio. Without opening the lease file, could you fill in all ten lines of the certificate above today, and would the tenant sign it without changes? If not, that gap may surface during a future sale or refinance, when the buyer or lender is working to a transaction deadline.

Note: This blog is operational guidance, not legal advice. Estoppel certificates are contract documents governed by the lease and by local law, and their effect depends on their wording. It reflects practice as checked in September 2026 and focuses mainly on US commercial leasing. Have counsel review any certificate before it is sent or relied on.

Frequently asked questions

Q1. What is a tenant estoppel certificate?
A signed statement in which the tenant confirms the key facts of its lease, typically requested when the property is sold or refinanced. Depending on the certificate, the lease and applicable law, a signed estoppel may prevent the tenant from later asserting facts that contradict it.

Q2. Does a tenant have to sign an estoppel certificate?
Generally only if the lease requires it. Most commercial leases do, often within a short period such as 10 to 15 days, though the lease sets the actual deadline. Many also allow the landlord to complete the certificate, or treat non-response as acceptance, if the tenant fails to respond.

Q3. What's the difference between an estoppel certificate and an SNDA?
An estoppel confirms the current facts of the lease. An SNDA sets rules for the future between tenant, landlord and lender, including subordination, protection from eviction on foreclosure, and recognising the lender as landlord.

Q4. Can an estoppel certificate change the lease?
It shouldn't. Its job is to confirm existing terms. Tenants are advised to watch for terms added that aren't in the lease. Genuine changes should be documented in a signed lease amendment.

Q5. What should a landlord check before sending one?
The complete set of lease documents, the tenant ledger (current rent, paid-through date, prepaid rent), the security deposit held, dates and options under the latest amendment, and any outstanding landlord obligations or known disputes.

Q6. Is an HOA estoppel certificate the same thing?
No. An association estoppel certificate confirms an owner's account with the association, and in some states follows statutory rules. In Florida, for example, a homeowners' association must issue one within 10 business days of a request.