" An Estoppel Agreement is a simple, one-page form that the tenant fills out letting you know the terms of their lease to the best of their knowledge. If the seller of the property will not let you speak with the tenants and get Estoppel Agreements, you might be dealing with a seller who is trying to hide something. "

― Brandon Turner , The Book on Managing Rental Properties: Find, Screen, and Manage Tenants With Fewer Headaches and Maximum Profits