Power of Attorney Requirements in Massachusetts

At a glance

Requirements one by one

Written designation and durability

Section 5-501(a) calls a durable power a writing in which the principal “designates another his attorney in fact” and includes the statute's durability words or similar words showing the same intent. That definition states no separate signing or witness ceremony. Section 5-504(b) treats an earlier written power that lacks durability as a distinct category; good-faith acts without actual knowledge of incapacity can still bind the principal. Its protection should not be mistaken for a durable grant.

Springing authority

The alternative wording in § 5-501(a) says the power “shall become effective upon the disability or incapacity of the principal.” The provision permits delayed effectiveness; it does not name a particular person or medical test to establish that the condition occurred.

Real-estate acknowledgment and recording

Chapter 183, § 32 applies the law on deed acknowledgment and recording to a letter of attorney for the conveyance of real estate. Under § 29, a deed cannot be recorded without an attached or endorsed certificate of acknowledgment or proof of due execution. For an acknowledgment made within Massachusetts, § 30(a) permits a justice of the peace or notary public. These are the relevant recordation rules; § 5-501(a) itself does not make notarization a general condition for an ordinary durable power.

What trips people up

A power used for a real-estate conveyance needs the ch. 183 recordation rules considered even though the general durable-power definition is shorter. For durability, § 5-501(a) requires the stated or similar words in addition to the written designation.

Common questions

Does the durable authority expire merely because time passes? Section 5-502 says it remains exercisable despite elapsed time unless the instrument states a time of termination.

Can an agent provide evidence that a power has not ended? Section 5-505 gives a good-faith reliance effect to an agent's affidavit stating lack of actual knowledge of termination; an authenticated affidavit is also recordable when the transaction instrument is recordable.

Statutes and sources

• § 5-501 — official section (accessed 2026-10-04). Quote: (a) A durable power of attorney is a power of attorney by which a principal designates another his attorney in fact in writing and the writing contains the words ''This power of attorney shall not be affected by subsequent disability or incapacity of the principal, or lapse of time,'' or ''This power of attorney shall become effective upon the disability or incapacity of the principal,'' or similar words showing the intent of the principal that the authority conferred shall be exercisable notwithstanding the principal's subsequent disability or incapacity, and, unless it states a time of termination, notwithstanding the lapse of time since the execution of the instrument. (b) References in this part to the disability or incapacity of the principal shall mean the mental illness or other disability of the principal recognized under the General Laws.
• § 5-502 — official section (accessed 2026-10-04). Quote: All acts done by an attorney in fact pursuant to a durable power of attorney during any period of disability or incapacity of the principal have the same effect and inure to the benefit of and bind the principal and his successors in interest as if the principal were competent and not disabled. Unless the instrument states a time of termination, the power is exercisable notwithstanding the lapse of time since the execution of the instrument.
• Mass. Gen. Laws ch. 190B, § 5-504(b) — official section (accessed 2026-10-04). Quote: The disability or incapacity of a principal who has previously executed a written power of attorney that is not a durable power shall not revoke or terminate the agency as to the attorney in fact or other person, who, without actual knowledge of the disability or incapacity of the principal, acts in good faith under the power. Any action so taken, unless otherwise invalid or unenforceable, binds the principal and his successors in interest.
• § 5-505 — official section (accessed 2026-10-04). Quote: As to acts undertaken in good faith reliance thereon, an affidavit executed by the attorney in fact under a power of attorney, durable or otherwise, stating that he did not have at the time of exercise of the power actual knowledge of the termination of the power by revocation or of the principal's death, disability, or incapacity is conclusive proof of the nonrevocation or nontermination of the power at that time. If the exercise of the power of attorney requires execution and delivery of any instrument that is recordable, the affidavit when authenticated for record is likewise recordable.
• § 32 — official section (accessed 2026-10-04). Quote: Section 32. The law relative to the acknowledgment and recording of deeds shall apply to letters of attorney for the conveyance of real estate.
• Mass. Gen. Laws ch. 183, § 29 — official section (accessed 2026-10-04). Quote: No deed shall be recorded unless a certificate of its acknowledgment or of the proof of its due execution, made as hereinafter provided, is endorsed upon or annexed to it, and such certificate shall be recorded at length with the deed to which it relates; but this section shall not apply to conveyances from the United States.
• Mass. Gen. Laws ch. 183, § 30(a) — official section (accessed 2026-10-04). Quote: If within the commonwealth, before a justice of the peace or notary public.