The word "oath" shall include "affirmation" in all cases where by law an affirmation may be substituted for an oath; and, in like cases, the word "sworn" shall include the word "affirmed."
N.H. Rev. Stat. Ann. § 21:24
Oath
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.