OPINION OF THE COURT
Judgment entered on or about April 1, 1999 affirmed, with $25 costs.
Although landlords couch their appellate arguments in terms of whether tenant timely "surrendered" possession at the end of the lease term, the case does not, strictly speaking, involve the issue of surrender. "At the expiration of [a lease] term the tenant leaves because his rights to possession have expired. There is no surrender of the term, because there is no estate to be reconveyed" (Stahl Assocs. Co. v Mapes, 111 A.D.2d 626, 628). In the absence of any competent evidence showing that the tenant asserted a right to possession to or allowed others to remain in the apartment following the expiration of his lease term, we sustain the dismissal of landlords' use and occupancy claim. "On a bench trial, the decision of the fact-finding court should not be disturbed upon appeal unless it is obvious that the court's conclusions could not be reached under any fair interpretation of the evidence, especially when the findings of fact rest in large measure on considerations relating to the credibility of witnesses." (Claridge Gardens v Menotti, 160 A.D.2d 544, 545.)