The short answer
An estoppel certificate is a signed statement from a tenant confirming the key facts of its lease as of a date: that the lease is in effect, the rent and the date to which it is paid, and whether the landlord is in default. A buyer or lender relies on it, and the tenant is then held to, or estopped from denying, what it certified. In an exchange, tenant estoppels are often a closing condition on both your sale and your purchase, so a slow tenant can put your 180-day deadline at risk.
At a glance
| Who signs | The tenant, at the landlord's request, for a named buyer or lender |
|---|---|
| Core contents | Lease in force, rent and the date it is paid through, and any notice of default |
| Lender practice | An agency guide requires one for each commercial lease producing 5% or more of income |
| Federal tenant | A federal lease clause gives the government 30 days to answer a joint request |
The duty to sign comes from the lease, and lenders set the minimums.
A tenant gives an estoppel because its lease requires it, so the time to respond and the contents are whatever the lease says. The federal government's own standard clause is a model of the core facts: under GSA Acquisition Manual clause 552.270-24, the contracting officer will, within 30 days of a joint written request from the landlord and a prospective lender or purchaser, state whether the lease is in full force, the date to which rent has been paid and whether any notice of default has been issued.
Lenders treat estoppels as core collateral documents. The OCC handbook lists executed tenant estoppels among the documents a bank keeps in a loan file, and the Fannie Mae Multifamily Guide requires a tenant estoppel certificate for each material commercial lease, defined as one producing 5% or more of the property's effective gross income.
A hypothetical: one estoppel turns up a $25,000 dispute two weeks before closing.
Hypothetical figures: you are selling a six-tenant retail center for $3,000,000 and the buyer's contract requires estoppels from every tenant. Five come back clean. The largest tenant's estoppel says it has overpaid $25,000 of CAM charges and disputes the latest reconciliation.
The buyer now wants a $25,000 credit or an escrow holdback until the dispute is settled. A credit lowers the price; a holdback leaves part of the price in escrow until a condition is met, and where that money goes on release decides whether it stays in the exchange. Settle the number before closing if you can, and run your own numbers with your CPA.
It bites on the replacement side, where the 180 days do not stretch.
Your identification and exchange periods run from your sale under section 1031(a)(3): 45 days to identify and 180 days to receive the replacement. If you buy leased property and your lender also needs estoppels, request them the day the purchase contract is signed. A tenant answering in 30 days, then a lender review, can eat a large share of the window, and the deadline does not extend for paperwork, as explained in extending the 45-day and 180-day deadlines.
A late estoppel on your own sale is less dangerous: it delays the closing, and the 45 and 180 days simply start later. The exposure is a replacement purchase that cannot close until a tenant answers.
When the lender also wants a tenant to subordinate its lease and recognize a foreclosure buyer, that separate document is an SNDA, and the two are usually requested together.
Related questions
Can a tenant refuse to sign an estoppel?
The duty comes from the lease. If the lease has no estoppel clause, the tenant may decline, so read every lease before you promise a buyer estoppels from all tenants.
Do residential tenants sign estoppels?
The agency guide's estoppel rule is written for commercial leases. For apartment units it relies on a lease audit that reconciles signed leases with the rent roll.
Will I see tenant estoppels for a DST property?
The sponsor collects them when it buys. Whether they appear in the offering materials is up to the sponsor, so ask.
Sources
Checked against these publications on September 30, 2026. Rules and figures change; confirm the current version with your CPA or attorney before you act. This page is general information, not tax or legal advice.