To execute a will and make it legally binding, you sign the document yourself in front of two competent adult witnesses who watch you sign (or hear you confirm the signature is yours) and then sign it themselves. Add a notarized self-proving affidavit at the same sitting and the will can be admitted to probate later without tracking those witnesses down. Skip any of these steps and a court can refuse the document entirely, sending your property to whoever your state’s default inheritance rules favor.
Who Can Sign a Will
You generally must be at least 18 and of sound mind at the moment you sign. A handful of states carve out narrow exceptions for emancipated minors or members of the armed forces, but the 18-and-older rule applies almost everywhere.
“Sound mind” has a practical definition. When you sign, you need to understand that you are making a will, roughly what property you own, and who your close family and intended beneficiaries are. Perfect memory is not required. Someone with early-stage dementia or a serious illness can still have capacity during a lucid interval.
If you think someone may later challenge your capacity, document it now. A short letter from your physician confirming your mental state on the signing date, a brief video of the ceremony showing you answering basic questions about your property and family, or contemporaneous notes from the supervising attorney can shut down a contest before it starts. These steps cost almost nothing.
The Signature
Your signature is what turns a draft into a will. You must sign it yourself, or, if you physically cannot, direct someone to sign your name while you watch. It does not have to be your full legal name. Initials, a mark, or an “X” will do if you intend it to authenticate the document.
Most states require the signature at the end. Anything written below the signature line may be ignored, so do not add gifts or instructions after you sign. Sign in front of your witnesses, or at minimum acknowledge to them that the signature on the page is yours.
The Two Witnesses
Nearly every state requires at least two witnesses. They watch you sign (or hear you acknowledge the signature), and then they sign the document themselves.
Pick witnesses who have no stake in your estate. Most states require them to be “disinterested,” meaning they inherit nothing under the will. Using a beneficiary as a witness rarely voids the entire document, but it causes real problems. A slim majority of states have “purging statutes” that strip away whatever the interested witness was supposed to inherit, reducing their share to what they would have received under intestacy. Even where no such penalty applies, using a beneficiary invites accusations of undue influence and can delay probate for months. The fix is easy: any two adults who are not named in the will. Neighbors, coworkers, and office staff all work.
Witnesses should be competent adults who could later testify, if asked, that you appeared to know what you were signing and did it voluntarily. They do not need to read the will or know its contents. Their job is to confirm the signing happened, not to approve your choices.
Adding a Self-Proving Affidavit
A self-proving affidavit is a sworn statement attached to the will, signed by you and your witnesses in front of a notary, confirming that the execution formalities were followed. It is not required for validity, but it removes one of the biggest headaches in probate: finding your witnesses years later so they can testify that the signing actually happened.
With the affidavit in place, the court accepts the notarized statements instead of live testimony. All but a few jurisdictions (the District of Columbia, Maryland, Ohio, and Vermont are the commonly cited holdouts) allow self-proving wills in some form.1Legal Information Institute. Self-Proving Will The affidavit is signed at the same ceremony as the will, adding a few minutes and the cost of a notary.
Witnesses move, become incapacitated, or die. If neither can be located when probate opens, the court must find other ways to authenticate the will, which costs time and money. Skipping notarization is one of the most common and most avoidable mistakes in estate planning.
Handwritten Wills as a Fallback
A holographic will is one written entirely (or in its material portions) in your own handwriting and signed by you, with no witnesses. About half the states recognize them in some form. Some require the entire document to be handwritten; others require only the key provisions.
Where recognized, holographic wills are legally valid, but treat them as a backup. Without witnesses, no one can confirm you wrote the document freely and with a sound mind, and handwriting disputes, unclear language, and missing details make them far easier to challenge. If you can execute a formal will, do that instead.
Electronic Wills
A growing number of jurisdictions allow electronic wills, but the map is uneven. As of 2026, roughly eight states and territories have enacted versions of the Uniform Electronic Wills Act, including Colorado, Idaho, North Dakota, Utah, and Washington. In those states, the will can exist as a digital document signed with an electronic signature and witnessed by two people who also sign electronically. The document must be readable as text and stored as a tamper-evident electronic record.
Read your state’s rule closely on witness presence. Some adopting states require witnesses to be physically present during the electronic signing; others allow remote witnessing by video. If your state requires physical presence, a will signed over Zoom with remote witnesses is invalid no matter how clearly everyone could see the screen.
In states that have not adopted electronic will legislation, the safe approach is the hybrid method: draft the will digitally, then print it and execute it the traditional way with wet signatures and live witnesses. Notarization alone does not replace the witness requirement anywhere.
Assets a Will Cannot Reach
A properly executed will does not control everything you own. Certain assets pass automatically to a named beneficiary or co-owner regardless of what the will says, and this catches people off guard.
- Life insurance policies, 401(k)s, IRAs, annuities, and payable-on-death or transfer-on-death accounts go directly to whoever is named on the beneficiary form filed with the financial institution. If your will leaves your IRA to your son but the beneficiary form still names your ex-spouse, the ex-spouse gets the account.
- Anything held in joint tenancy with right of survivorship passes automatically to the surviving co-owner. Your will cannot redirect a jointly held bank account, brokerage account, or piece of real estate.
- Assets you transferred into a revocable living trust during your lifetime are distributed under the trust terms, not the will.
Executing your will is only half the job. Review every beneficiary designation and account title so they match the plan the will lays out. An outdated beneficiary form from a decade ago can override a brand-new will.
Storing and Updating the Original
The original signed will is what matters in probate. Copies are treated with suspicion; in many states, if the original cannot be found after your death, courts presume you destroyed it intentionally and revoked it.
A fireproof home safe works if your executor knows the combination. A bank safe deposit box is secure but can create access problems after death if no one else is authorized on the box. Some states let you deposit the original with the local probate court or register of wills during your lifetime. An estate planning attorney’s office is another common choice; confirm the firm has a long-term retention policy. Wherever you store it, tell your executor and at least one other trusted person where it is.
You can revoke a will by executing a new one that expressly revokes prior wills, or by physically destroying the old document with intent to revoke. Physical destruction means burning, tearing, or obliterating the paper. A codicil is a formal amendment and must be executed with the same formalities as the will itself. In practice, drafting a fresh will is almost always cleaner than stacking codicils, which invite litigation over which provisions survive.
Divorce triggers an automatic change in most states: any provisions benefiting your former spouse are treated as if the ex-spouse had died before you. That default is not a substitute for updating the document. If you remarry, have children, acquire significant assets, or change your mind, sign a new will.
What Happens If Execution Fails
If the will is not properly executed and a court refuses to admit it to probate, your estate passes under your state’s intestacy laws. Those default rules divide everything among your closest relatives in a fixed order. If no relatives survive, the state takes the property.
Intestacy ignores your wishes entirely. An unmarried partner gets nothing. A favorite charity gets nothing. A stepchild you raised but never legally adopted gets nothing. The formalities of execution exist because courts need reliable proof that the document reflects what you actually wanted, and getting them right is the whole point of signing a will in the first place.