If the proceeds of a sale under this subchapter are greater than the amount of the lien and the reasonable expenses of the sale, the lessor shall deliver written notice of the excess to the tenant’s last known address as stated in the rental agreement or in a written notice from the tenant to the lessor furnished after the execution of the rental agreement. The lessor shall retain the excess and deliver it to the tenant if the tenant requests it before two years after the date of the sale. If the tenant does not request the excess before two years after the date of the sale, the lessor owns the excess.