R.I. Gen. Laws § 6A-2.1-514: Waiver of lessee’s objections.

(1) In rejecting goods, a lessee’s failure to state a particular defect that is ascertainable by reasonable inspection precludes the lessee from relying on the defect to justify rejection or to establish default:

(a) If, stated seasonably, the lessor or the supplier could have cured it (§ 6A-2.1-513); or

(b) Between merchants if the lessor or the supplier after rejection has made a request in writing for a full and final written statement of all defects on which the lessee proposes to rely.

(2) A lessee’s failure to reserve rights when paying rent or other consideration against documents precludes recovery of the payment for defects apparent in the documents.