If you are leasing space in a building, there may come a time when you receive a request from your landlord to fill out and sign an estoppel certificate. Estoppel certificates are usually sent to tenants in connection with the sale or refinance of a building, and a third party may rely on the accuracy of the statements and information contained in the estoppel certificate in connection with that transaction. Estoppel certificates can range from a very simple, one-page document, to several pages.

I’ve received an estoppel certificate in the mail. What do I do now?

Consider the following:

Check your lease. Your lease may require you to deliver the signed estoppel certificate and may even give you a timeframe within which you are required to return it. A form of estoppel certificate may also be included in your lease as an exhibit. If you’ve previously agreed to a form of estoppel certificate in your lease, check to ensure the one you have received matches the form you previously agreed to and if it doesn’t make sure to review it carefully to make sure it is acceptable.

Review the estoppel certificate and confirm that all of the information is accurate. Be on the lookout for any terms or provisions that you did not agree to in your lease. If it seems like the landlord is trying to modify your lease, you likely do not need to consent to the change in this document. Cross off (or modify or delete, if you have an electronic copy) any information that is inaccurate. Fill in all blanks (if the blank is not applicable, write “N/A”), and if any exhibits are referenced in the body of the document, make sure they are actually attached.