A deed not acknowledged by the grantor, but in other respects duly executed, may be recorded, and for 60 days thereafter it shall be as effectual as if duly acknowledged.
N.H. Rev. Stat. Ann. § 477:10
Unacknowledged Deed
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.