13 Pa.C.S. § 2A509: Lessee's rights on improper delivery; rightful rejection.

(a) General rule.--Subject to the provisions of section 2A510 (relating to installment lease contracts: rejection and default) on default in installment lease contracts, if the goods or the tender or delivery fail in any respect to conform to the lease contract, the lessee may reject or accept the goods or accept any commercial unit or units and reject the rest of the goods.

(b) Effectiveness of rejection.--Rejection of goods is ineffective unless it is within a reasonable time after tender or delivery of the goods and the lessee seasonably notifies the lessor.