A certificate of acknowledgment or proof of execution must be indorsed on or annexed to the deed, and then the deed and certificate may be recorded in the registry of deeds. No deed can be recorded without such certificate. <div
Me. Rev. Stat. tit. 33, § 306
-- indorsement of certificate of acknowledgment
Official source: Maine Legislature. Reproduced from public-domain Maine statutes; confirm against the official source for the current text. Not legal advice.