In the German National Bank v. Speckert case of 1900, the U.S Supreme Court ruled in favor of German National Bank. The dispute arose when John G. Speckert and his wife executed a mortgage on their property to secure a debt owed to the bank. After Mr. Speckert's death, his widow claimed that she was not aware that her dower rights were waived by signing this document and therefore should not be held accountable for paying off the debt from her portion of inherited property. The court rejected Mrs. Speckert’s claim stating that as an adult woman who signed a legal contract, she is presumed to understand its contents unless there is evidence proving otherwise - which was absent in this case. This ruling reinforced two important principles: firstly, it upheld contractual obligations regardless of personal circumstances; secondly, it emphasized gender equality under law by holding women equally responsible for understanding legal contracts they sign into voluntarily.

In the dissenting opinion for German National Bank v. Speckert, it was argued that the bank should not be held liable for a check fraudulently endorsed by an individual who was not its customer. The dissenting justices believed that the responsibility should fall on those who dealt directly with the fraudulent endorser and failed to verify his identity or authority to endorse checks in another person's name. They contended that holding banks accountable in such cases would place an undue burden on them and potentially disrupt normal banking operations, as they would have to scrutinize every transaction more closely than is reasonably possible or practical. Furthermore, they pointed out that there were other legal remedies available to parties defrauded in this manner without involving innocent third parties like banks which merely provided routine services based on good faith and customary practice.