§ 3403 Unauthorized Signature Effectiveness
This rule says a signature that someone isn’t allowed to make doesn’t count, unless the person who pays for it does so in good faith, and the signature can be approved later.
A small business needs two owners to sign a check, but only one owner signs it.
Because one required signature is missing, the check’s signature is not valid. If the bank still pays the check, the payment only works for the person who gave the money, and the owner who signed without permission can still get in trouble.
AI-generated — May contain errors. Not legal advice. Always verify source.
§ 3403 Unauthorized Signature Effectiveness
Last verified: January 10, 2026