Are you the buyer or the seller or is this a refinance? Tenants do have certain rights to privacy. I suggest you just try talking to them and being polite. If you have done that and it didn't work speak to a landlord tenant attorney. Good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales
Madison Estates & Properties, Inc.
Office: (718) 645-1665/ Cell: (917) 805-0783