Mass. Gen. Laws ch. 246 § 28A
Twenty-five hundred dollars of any natural person in an account in a trust company, savings bank, cooperative bank, credit union, national banking association or other banking institution doing business in the commonwealth shall be exempt from attachment by trustee process. A trustee summons served on any such institution shall describe the exemption with reference to this section. Upon service of a trustee summons, the trustee shall answer as subject to attachment only so much money of the defendant that exceeds $2,500.
No business, trust or organization shall be entitled to the exemption in this section and no natural person shall be entitled to more than a $2,500 exemption at any one time. In any action, the plaintiff may apply to the court for further attachments upon proof by certified records of a trustee that the defendant has received an exemption not authorized under this section or that the $2,500 exemption of the defendant has been in whole or in part exhausted or exceeded.
Mass. Gen. Laws ch. 246, § 28A