Guarantor's Failed Forgery Defense Against Promissory Note

A party who had signed a promissory note as a guarantor, but who was not the primary debtor, sought to contest the debt's validity by alleging that the signature on the note was forged, a claim which was dismissed by the lower courts due to insufficient evidence provided by the guarantor to support the forgery assertion. The high court upheld the lower court's decision, reasoning that the party claiming forgery bears the burden of proof to substantiate that claim, and the failure to present convincing evidence justifies the enforcement of the obligation stipulated in the note against the guarantor.