In the United States v. Erwin case of 1892, the Supreme Court ruled on a dispute involving land ownership in California. The defendant, Erwin, had purchased land from an individual who claimed to have received it as part of a Mexican Land Grant before California became part of the U.S. However, this grant was never confirmed by Congress or any other competent authority after California's admission into the Union. Therefore, when another party also laid claim to this same piece of property based on a patent issued by U.S government under federal law years later; there arose conflict over rightful ownership. The court held that since no legal confirmation was made for original Mexican Land Grant post-California’s inclusion into US territory and considering that all unconfirmed grants were declared public lands according to Act passed in March 3rd 1851; they belonged rightfully to Federal Government which could dispose them off at its discretion. Therefore, even though Erwin bought his title in good faith from someone claiming rights through old Mexican grant system; he couldn't establish valid title against one derived directly from United States under its laws because previous owner’s claim wasn’t legally established following due process after changeover happened.

In the dissenting opinion for United States v. Erwin, it was argued that the court majority had erred in its interpretation of a statute related to tax collection. The dissenting justices believed that the law did not intend to hold collectors personally liable for taxes they were unable to collect due to insolvency or bankruptcy of taxpayers. They contended that such an interpretation would place an unreasonable burden on collectors and could potentially discourage individuals from accepting these positions. Furthermore, they expressed concern over how this ruling might impact future cases involving similar circumstances, arguing it set a dangerous precedent by interpreting laws too broadly and beyond their intended scope.