N.Y. Real Property Law § 225: Notice of action adverse to possession of tenant

§ 225. Notice of action adverse to possession of tenant. Where a

process or summons in an action to recover the real property occupied by

him, or the possession thereof, is served upon a tenant, he must

forthwith give notice thereof to his landlord; otherwise he forfeits the

value of three years' rent of such property, to the landlord or other

person of whom he holds.