N.Y. Civil Practice Law & Rules § 2001: Mistakes, omissions, defects and irregularities

§ 2001. Mistakes, omissions, defects and irregularities. At any stage

of an action, including the filing of a summons with notice, summons and

complaint or petition to commence an action, the court may permit a

mistake, omission, defect or irregularity, including the failure to

purchase or acquire an index number or other mistake in the filing

process, to be corrected, upon such terms as may be just, or, if a

substantial right of a party is not prejudiced, the mistake, omission,

defect or irregularity shall be disregarded, provided that any

applicable fees shall be paid.