Me. Rev. Stat. tit. 36, § 948

When taxes are assessed under section 713, the lien upon real estate shall be enforced as provided in sections 941 to 943; except that if real estate shall have been transferred to a bona fide purchaser for value since the assessment was omitted or invalidly made with the transfer duly recorded, prior to the date of the supplemental assessment, the lien shall terminate. <div