Dementia & Legal Capacity: How Attorneys Determine Whether Someone Can Sign Documents

Understanding Demential and Legal Capacity Is a Critical Element of Elder Care and Elder Law

Legal capacity is a specific definition. I want to make this point perfectly clear right up front: A person who has received a dementia diagnosis is not automatically exempt from being able to sign legal documents. This is one of the most misunderstood aspects of a dementia diagnosis families face. Many assume that a dementia diagnosis automatically means a person “lacks capacity,” but the legal standard is far more nuanced. Legal Capacity is not a blanket determination; it is task-specific, can fluctuate, and depends on the individual’s understanding at the time a document is signed.

Legal Capacity Is About Understanding

In the legal world, capacity focuses on whether someone can understand the nature and consequences of a decision. Often, capacity declines unpredictably over time. A diagnosis of dementia does not automatically remove that ability. Many individuals in early or moderate stages of dementia still have periods of clarity during which they can meaningfully participate in legal planning.

Attorneys look at function, not just medical labels. The key question is: Does the person understand what they are signing and why?

Different Documents Require Different Levels of Capacity

Another essential point is that capacity is document specific. The law also recognizes that some decisions are more complex than others.

• Powers of Attorney & Advance Directives: These documents require the person to understand that they are appointing another person to act on their behalf and what authority they are granting. The capacity threshold is relatively low.
• Wills: To sign a will, a person must understand their property, their family relationships, and the general nature of the document.
• Contracts, Deeds, or Financial Transactions: These often require the highest level of capacity because they can involve complicated financial consequences.

A person may be perfectly capable of signing a health care proxy but not capable of understanding a real estate transfer.

How Attorneys Assess Capacity in Practice

Lawyers use a combination of observation, experience, and sometimes medical input. While not doctors, attorneys are trained to identify signs of impaired decision-making.

During an assessment meeting, ideally held privately without family prompting,the attorney may:

• Ask open-ended questions to gauge understanding,
• Request the person explain the document in their own words,
• Assess orientation (time, place, situation)
• Evaluate communication abilities and consistency,
• Look for signs of confusion, undue influence, or outside pressure.

If capacity appears borderline, your attorney may suggest bringing in a physician’s letter or conducting the signing during a known “good time of day” for the client. Some attorneys may document the meeting with notes or video to prevent future challenges.

Family Misunderstandings Are Common

Loved ones often misunderstand what capacity means. Some worry that a parent is “too forgetful” to sign anything, while others push for documents even when the person clearly cannot understand them. Both misunderstandings can lead to legal disputes, guardianship proceedings, or accusations of coercion.

The Bottom Line: Act Quickly

The best time to handle legal planning after a diagnosis of dementia is as early as possible, while meaningful planning can still occur. The safest path is to consult an attorney familiar with elder law and estate planning—someone who can help navigate the delicate balance between autonomy, safety, and legal protection.

I encourage families to be proactive. Don’t wait for a specific event or medical emergency to plan for future care. If you, or a loved one has received a dementia diagnosis and you would like to assess capacity, or you simply want to make a plan that addresses your desires before cognitive decline begins, give my office a call today at (470) 235-7868.

Looking to find an experienced estate lawyer in the Georgia area who is skilled in asset protection and estate plan preparation? Shannon Pawley is an attorney in Georgia with expertise in estate planning and asset protection. Shannon can provide assistance with creating an estate plan to include making a will and how to establish a trust properly. If you have questions about asset protection or questions about making an estate plan, reach out to Shannon and she will be glad to help answer all the estate planning questions you might have!