Estoppel certificate - Wikipedia
An Estoppel Certificate (or Estoppel Letter) is a document often used in due diligence in Real estate and mortgage activities.
Commercial Lease Agreement - SEC.gov
In connection with any waiver of a Tenant default or modification of this Lease, ... (e) After giving Landlord 30-days' prior written notice thereof, Tenant ...
2A-502. NOTICE AFTER DEFAULT. | Uniform Commercial Code
§ 2A-502. NOTICE AFTER DEFAULT. ... Except as otherwise provided in this Article or the lease agreement, the lessor or lessee in default under the lease contract ...