Me. Rev. Stat. tit. 33, § 251

The Governor may appoint one or more commissioners in any other of the United States and in any foreign country, who shall continue in office during his pleasure; and have authority to take the acknowledgment and proof of the execution of any deed, other conveyance or lease of lands lying in this State; and of any contract, letter of attorney or any other writing, under seal or not, to be used or recorded in this State. <div