Me. Rev. Stat. tit. 18-C, § 6-206

The provisions of subpart 2 concerning beneficial ownership as between parties or as between parties and beneficiaries apply only to controversies between those persons and their creditors and other successors and do not apply to the right of those persons to payment as determined by the terms of the account. Subpart 3 governs the liability and set-off rights of financial institutions that make payments pursuant to subpart 3.