Mistaken Identity as Error Invalidating Debt Acknowledgment

A person who signed a document acknowledging a debt, but who was not the actual debtor and was unaware of the true nature of the obligation at the time of signing, may invoke the defense of error to annul the obligation, as the consent was vitiated because the essential element of the contract—the identity of the true debtor—was mistaken. The court quashed the lower court's decision because it failed to properly consider that the signatory's mistake regarding the debtor's identity constituted a fundamental error invalidating their consent to the debt acknowledgment.