P.R. Laws tit. 10, § 1712
A purchaser who, at the time of receiving the merchandise carefully examines the same, shall have no right of action against the vendor, alleging a defect in the quantity or quality of the merchandise.
A purchaser shall have a right of action against vendor for defects in the quantity or quality of merchandise received in bales or packages, provided he brings his action within the four days following its receipts, and that the average is not due to accident or to the nature of the merchandise or to fraud.
In such cases the purchaser may choose between the rescission of the contract or its fulfillment in accordance with what has been agreed upon, but always with the payment of the damages he may have suffered by reason of the defects or faults.
The vendor may avoid this claim by demanding when making the delivery that the merchandise be examined fully by the purchaser with regard to the quantity and quality thereof.
History —Commerce Code, 1932, § 254.