A will is formally called a Last Will and Testament. That is the name printed on the document itself and used in court filings, though in everyday conversation most people shorten it to “will.” Both words mean the same thing today, and either one refers to the written instructions you leave behind for distributing your property, naming a guardian for any minor children, and choosing an executor to carry out your wishes.
Why the Name Has Two Words
The phrase sounds redundant because it is. Under old English law, “will” and “testament” were separate documents for separate kinds of property. A will gave instructions about real property, meaning land and buildings. A testament disposed of personal property, meaning money, livestock, furniture, and other movable belongings. Once those two bodies of law merged, lawyers kept both words out of habit, and the pairing has survived for centuries as pure tradition.
In every modern court, “will,” “testament,” and “Last Will and Testament” all refer to the same thing: your final written instructions for everything you own. You can use any of the three terms when speaking with an attorney or a court clerk and be understood.
What the Document Actually Does
A Last Will and Testament does three jobs. It names who inherits your property. It names a guardian for any minor children. And it names an executor, the person responsible for carrying out your instructions.
The executor does not automatically gain authority the moment you die. A probate court first validates the will and issues a separate document called letters testamentary, which formally grants the executor power to access bank accounts, sell property, pay debts, and distribute what remains.1American Bar Association. The Probate Process
For the will to be valid in the first place, the person creating it (the testator) must generally be at least 18 and of sound mind, meaning they understand what they own, who their family members are, and what the document does. The will must be in writing, signed by the testator, and witnessed by at least two people who are not beneficiaries. Exact requirements vary by state, but that baseline holds across most of the country.
Many wills also include a self-proving affidavit, a sworn statement signed by the witnesses in front of a notary. The affidavit removes the need for witnesses to appear in court and testify after you die, which can shave weeks off probate. All but four jurisdictions, the District of Columbia, Maryland, Ohio, and Vermont, recognize self-proving wills.2Legal Information Institute. Self-Proving Will
Other Names You Might Hear
The standard typed, signed, and witnessed document is sometimes called an attested will to distinguish it from a few less common forms. Each alternative goes by its own name, and each carries real limits.
- A holographic will is written entirely or in material part in the testator’s own handwriting and signed by the testator, with no witnesses. Not every state recognizes them. New York, for example, accepts them only from military members during active service or mariners at sea.3Legal Information Institute. Holographic Will
- A nuncupative will is spoken aloud to witnesses rather than written down. Most states reject these entirely. The few that accept them typically require that the testator be in immediate danger of death, that at least two witnesses hear the instructions, and that the witnesses write down the spoken terms within about 30 days.
- A joint will is a single document executed by two people, almost always spouses. Once one spouse dies, the will usually becomes irrevocable, which is why most planners advise against them.
- Mutual wills are two separate documents with matching terms, offering more flexibility than a joint will because each person can update their own.
You may also hear the word codicil. That is not a type of will but a legal amendment to one, used for targeted changes like updating a beneficiary’s name or swapping in a new executor. A codicil must be executed with the same formalities as the original will.
One more term causes recurring confusion: a living will has nothing to do with distributing property. It records your preferences for medical treatment if you become incapacitated, and it operates while you are alive rather than after death.4National Institute on Aging. Advance Care Planning: Advance Directives for Health Care Despite the shared word, it is a separate document with a separate purpose.
What a Will Does Not Cover
A Last Will and Testament controls only the assets in your probate estate. Several common categories of property pass outside the will entirely and go directly to whoever is named on the account. Life insurance policies, 401(k) plans, IRAs, and annuities transfer to the listed beneficiary regardless of what your will says. Payable-on-death designations on bank accounts and transfer-on-death designations on brokerage accounts work the same way. An outdated beneficiary form will override even a carefully drafted will, which is why those designations deserve a review after any major life change.
What Happens Without One
Dying without a valid will is called dying intestate, and it means state law decides who inherits. Every state has intestacy statutes that set a rigid order of priority, generally running from surviving spouse and children to parents, siblings, and more distant relatives. Your personal preferences play no part. In some states a surviving spouse splits the estate with children but is guaranteed at least a third; in others the spouse takes everything if there are no children.
Two practical consequences follow. The court appoints an administrator rather than someone you chose, and that administrator may be required to post a surety bond, which costs money and slows the process.5American Bar Association. Guidelines for Individual Executors and Trustees If you have minor children and no will naming a guardian, the court chooses one based on its own assessment of the child’s best interests. Relatives often get priority, but nothing is guaranteed, and the process can involve hearings and home studies that drag on while your children wait.
Whatever name you use for the document, that is what it exists to prevent. The formal title is centuries-old legal tradition. The paper behind it is what keeps the decisions in your hands rather than a judge’s.