Amendments in matters of substance may be permitted in any action, in any stage of the proceedings, upon such terms as the court shall deem just and reasonable, when it shall appear to the court that it is necessary for the prevention of injustice; but the rights of third persons shall not be affected thereby.
N.H. Rev. Stat. Ann. § 514:9
Amendments
Applied in 3 court decisions — leading case Rosenblatt v. Baer (1966)
Most recently applied in Shawn Murphy v. Strafford County et al. (March 2022)
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.