California gives these certificates the sharpest teeth in the country through Evidence Code section 622 and the Plaza Freeway line of authority. A commercial tenant that certifies a date, a rent or the absence of a claim will be held to it against the landlord's successor. Residential practice differs: Civil Code section 1953 voids lease provisions waiving a residential tenant's statutory rights, including those under section 1950.5, so a residential certificate drafted as a general release fails to that extent.
Texas leaves commercial landlord and tenant relations largely to the lease, and Chapter 93 of the Texas Property Code is thin by design, so the estoppel covenant and its deemed-approval remedy stand as written. One statutory hook matters at closing. Under section 93.007, the buyer assumes liability for the commercial security deposit, and the seller stays liable until the buyer delivers the tenant a signed statement acknowledging receipt and stating the exact amount. The deposit certified in the estoppel is the number that statement must match.
Florida uses one name for two unrelated documents. The tenant certificate is a creature of the lease. The association estoppel certificate is statutory: Florida Statutes section 718.116(8) for condominiums and section 720.30851 for homeowners associations require issuance within 10 business days of a written request, with a capped fee and waiver of any understated balance against a good faith purchaser.
New York adds a deadline unrelated to the lease. Under General Obligations Law section 7-105, a landlord conveying leased property must turn deposits over to the grantee at delivery of the deed or within five days and notify each tenant by registered or certified mail of the transferee's name and address. Non-compliance is a misdemeanor. Tenants should also weigh the no default certification against their Yellowstone exposure.