In the 1927 case of Gallardo v. Santini Fertilizer Company, the U.S. Supreme Court ruled in favor of defendant Santini Fertilizer Company. The plaintiff, Gallardo, a Mexican citizen and resident had sued for damages after his land was flooded due to negligence by the fertilizer company's employees during their operations in Mexico. However, because both parties were foreign entities (Gallardo being a Mexican citizen and resident; Santini Fertilizer Co., an Italian corporation), they lacked diversity jurisdiction under U.S law which requires at least one party be a US citizen or entity. Furthermore, since no federal question was involved that could invoke federal jurisdiction based on subject matter - it fell outside the purview of American courts as per international law principles regarding extraterritoriality and sovereignty issues. The court held that while it sympathized with Gallardo’s situation, it did not have authority to adjudicate this dispute given its strictly domestic legal mandate unless Congress expressly provided such power via legislation – which hadn’t occurred here. Thusly dismissing his claim without prejudice so he might pursue relief through appropriate channels like local courts where incident happened or diplomatic negotiations between respective governments if necessary considering potential transnational implications involved herein.

The dissenting opinion in the case of Gallardo v. Santini Fertilizer Company argued that the court majority erred in its interpretation and application of Puerto Rican law, specifically regarding contract obligations. The dissent believed that under local law, a party who has received benefits from a contract cannot refuse to fulfill their own contractual obligations on grounds of illegality if they were aware or should have been aware of this illegality at the time they entered into the agreement. In this case, it was contended that Mr. Gallardo knew or should have known about any potential legal issues surrounding his employment contract with Santini Fertilizer Company when he accepted it and therefore could not later claim ignorance as an excuse for non-performance. Furthermore, even if there had been some form of misrepresentation by Santini Fertilizer Company during negotiations which led to Mr.Gallardo's acceptance of terms he would otherwise reject, such deception does not absolve him from fulfilling his part once he benefited from said agreement.