N.Y. Civil Practice Law & Rules § 1501: Actions against persons jointly liable; service of summons; judgment

§ 1501. Actions against persons jointly liable; service of summons;

judgment. Where less than all of the named defendants in an action based

upon a joint obligation, contract or liability are served with the

summons, the plaintiff may proceed against the defendants served, unless

the court otherwise directs, and if the judgment is for the plaintiff it

may be taken against all the defendants.