Me. Rev. Stat. tit. 10, § 3252

If the labor, materials or services were not furnished by a contract with the owner of the property affected, the owner may prevent a lien under section 3251 for labor, materials or services not then performed or furnished, by giving written notice to the person performing or furnishing the labor, materials or services that the owner will not be responsible for the performing or furnishing of the labor, materials or services.