New York Laws
Title 1 - Discharge of Joint Obligors
15-102 - Co-Obligor Not a Party.

ยง 15-102. Co-obligor not a party. A judgment against one or more of
several obligors, or against one or more of joint, or of joint and
several obligors shall not discharge a co-obligor who was not a party to
the proceeding wherein the judgment was rendered.