Most people assume that once they have a will document, they are done. The signing ceremony is where wills fail. Requirements vary by state: the number of witnesses, whether notarization creates a "self-proving" will that skips probate court testimony, and whether a completely handwritten will can skip witnesses entirely. Getting any one of those wrong can render a will invalid or force your family through contested probate.
This guide covers the rules for all 50 states.
This is not legal advice. Requirements change as states update their statutes. Talk to a licensed attorney in your state before finalizing any will.
The Core Requirement: Witnesses
Most states require 2 adult witnesses present when you sign your will. The witnesses must sign the will in front of you and in front of each other. The "interested witness" rule applies in most states: a witness who is also a named beneficiary under the will creates a problem. In some states that voids the bequest to that witness. In a small number of states it can void the will entirely. The safe practice: use two witnesses who receive nothing under the will.
Notarization and Self-Proving Affidavits
No state requires notarization to make a standard attested will valid. What notarization does is create a "self-proving affidavit" - a separate document the witnesses sign before a notary at the same time as the will. A self-proving will can be admitted to probate without requiring witnesses to appear and testify. Most states allow self-proving wills. A few (Ohio, Connecticut) integrate the self-proving oath directly into the will signing itself. Getting the affidavit right requires knowing your state's exact form requirements.
Holographic Wills: What They Are and Which States Recognize Them
A holographic will is entirely handwritten and signed by the testator, with no witnesses required. About half of US states recognize them, including California, Texas, Virginia, and North Carolina. Requirements vary: some states require the entire document to be in the testator's own handwriting; others accept a mix of handwritten and printed text if the material provisions are handwritten. States that do not recognize holographic wills include Florida, Georgia, Illinois, and most northeastern states. A holographic will found in a non-recognizing state is invalid.
The 50-State Requirements Table
Common Witness Mistakes That Void Wills
Four errors account for most defective wills: (1) Not enough witnesses present at the signing - the witness count must match what the state requires. (2) A witness who is also a beneficiary - the interested-witness rules vary by state, but the risk is not worth taking. (3) Witnesses who signed at a different time or location than the testator - all signatures typically need to happen in one session. (4) Witnesses who are minors - most states require witnesses to be at least 18. All four errors are preventable with basic advance planning.
When to Have an Attorney Review Your Will
A correctly executed will that still has drafting errors - ambiguous beneficiary designations, no residuary clause, improper handling of jointly-held property - creates the same probate complications as a defectively signed one. If you used an AI tool or online template to generate your will, a licensed estate planning attorney can review both the signing requirements and the substantive language in a single appointment. This is a standard service, not an expensive undertaking.