In the case of Sigafus v. Porter in 1900, the US Supreme Court ruled on a dispute involving property rights and mortgage law. The plaintiff, Sigafus, had purchased land from Porter under an agreement that allowed him to pay for it over time while retaining possession of the property. However, when he defaulted on his payments due to financial difficulties, Porter sought to repossess the land without providing any compensation for improvements made by Sigafus during his period of ownership. The court held that although a defaulting purchaser does not have absolute right to reimbursement for improvements made on mortgaged premises after default but before foreclosure sale; however if there is surplus remaining after paying off mortgage debt from proceeds of such sale then this should be applied towards reimbursing value added by these improvements.

In the dissenting opinion for SIGAFUS v. PORTER, 1900, it was argued that the majority's decision to uphold a lower court ruling in favor of Porter failed to adequately consider Sigafus' rights as an investor. The dissenting justices believed that Sigafus had been misled by fraudulent representations made by Porter and his associates about the value of certain mining properties. They contended that these misrepresentations were not merely expressions of opinion but constituted actionable fraud because they were knowingly false and intended to deceive potential investors like Sigafus. Therefore, they felt that he should have been allowed to rescind his contract with Porter and recover his investment money on grounds of fraudulence.