There are two ways to make a will null and void, and which one applies depends on whose will it is. If it’s your own, you can revoke it any time you’re alive and mentally competent by writing a new one, physically destroying the old one, or signing a formal revocation. If it belongs to someone who has died and you want it thrown out, you have to file a will contest in probate court, prove a specific legal defect, and beat a short filing deadline. Revoking your own will takes an afternoon. Contesting someone else’s can take years and tens of thousands of dollars, with no guaranteed result.
Revoking a Will You Wrote
While you’re alive, the will is yours to cancel. Nobody’s permission is required, and courts recognize three methods.
Sign a New Will
The cleanest option is executing a new will that expressly revokes all prior wills and codicils. Nearly every properly drafted will opens with that clause. Once the new document is signed and witnessed under your state’s rules, the old one has no legal effect. If a new will doesn’t expressly revoke the older one but covers the same property in contradictory ways, the newer document controls to the extent of the conflict. Express revocation language is safer because it removes any argument about which document governs.
Physically Destroy It
Burning, tearing, shredding, or obliterating the will revokes it, provided you act with the clear intent to revoke. Writing “VOID” across every page or crossing out your signature also works in most states. Intent is the key element. Spilling coffee on your will by accident doesn’t revoke it; tearing it in half on purpose does. If you physically can’t destroy it yourself, another person may do so in your presence and at your direction.
Watch out for copies. If you destroy the original but photocopies still exist, the copies have no independent legal force. But if the original can’t be found after your death, some states presume you destroyed it intentionally, while others may admit a copy to probate with additional proof. Destroying every known copy along with the original avoids the problem.
Sign a Written Revocation
You can sign a standalone document that does nothing but revoke your existing will, without replacing it. The revocation must meet the same execution requirements as a will, which means your signature and the required number of witnesses. This route is less common than simply writing a new will, but it’s useful when you want to cancel your current estate plan without immediately putting a new one in place.
Life Events That Revoke a Will Automatically
In a majority of states, divorce automatically revokes any provisions in your will that benefit your former spouse. The law treats those sections as if your ex-spouse died before you, wiping out any gifts, executor appointments, or powers granted to them. The rest of the will stays intact. This happens by operation of law, so even if you never update your will after the divorce, in most jurisdictions your ex won’t inherit under it.
Marriage and the birth or adoption of a child can also trigger automatic changes, though the rules vary more widely. Some states partially or fully revoke a will written before the marriage if it doesn’t account for the new spouse. Others guarantee a child born or adopted after the will was signed an intestate share even if the will doesn’t mention them. These rules are a safety net, not a plan. Update your will after any major life change instead of relying on them.
Contesting Someone Else’s Will
Once the person who made the will has died, you can no longer revoke it. Invalidating it requires a will contest filed in the probate court handling the estate. Two threshold questions decide whether you can even bring one: do you have standing, and do you have a recognized legal ground?
Who Can File
Standing means you have a direct financial stake in the outcome. Courts enforce this strictly. Two groups usually qualify. The first is heirs-at-law, the close relatives who would inherit under state intestacy rules if no valid will existed. Surviving spouses, children, and parents almost always fit. The second group is anyone named as a beneficiary in the contested will or in a prior version of it. A child included in an older will but cut out of a newer one has standing to challenge the newer document, because they stand to gain if it’s thrown out.
Creditors of the deceased generally cannot contest a will, since their claims get paid from the estate regardless of how assets are distributed. Creditors of an heir face a harder path and usually lack standing unless they hold a judgment lien against the heir’s expected inheritance, and even then courts are split.
Grounds for Invalidating a Will
Being upset about what a will says is not a ground. You have to prove one of the recognized legal defects below.
Improper Execution
Every state requires certain formalities. The standard rule is that a will must be in writing, signed by the person who made it, and witnessed by at least two disinterested adults who saw the signing or heard the testator acknowledge it. Some states require three witnesses. If any of these steps was skipped or done wrong, the entire document can be thrown out.
Roughly half the states also recognize holographic wills, which are handwritten and need no witnesses. For a holographic will to be valid, the signature and all material provisions must be in the testator’s own handwriting. A typed will with no witnesses fails everywhere; a fully handwritten one may hold up depending on the state.
Lack of Testamentary Capacity
The testator must have been mentally competent when they signed. The legal bar is lower than most people expect. The testator needed to understand what a will does, have a general sense of what property they owned, and recognize who their close family members were. Someone with early-stage dementia might still meet that standard on a good day, which is why capacity challenges are often harder to win than families anticipate. The question is always about the testator’s mental state at the specific moment of signing, not their general condition in the weeks or months around it.
Undue Influence
Undue influence applies when someone in a position of trust pressured the testator so heavily that the will reflects what the influencer wanted, not what the testator actually intended. Classic red flags include a caregiver who isolated the testator from family, a new beneficiary who helped arrange the will’s drafting, or sudden dramatic changes to an estate plan late in life.
Proving undue influence is difficult because the person who could confirm it is dead. Courts in many states recognize a shortcut. If the challenger can show that a confidential or fiduciary relationship existed between the testator and the beneficiary, that the beneficiary was actively involved in preparing the will, and that the beneficiary received a substantial benefit, the burden shifts. The beneficiary then has to come forward with evidence that the will was the testator’s genuine choice. Without that shift, the challenger carries the full weight of proof throughout the case. Even after the presumption kicks in, the challenger still has to persuade the judge their version is more likely true.
Fraud or Forgery
Fraud takes two forms. In fraud in the execution, the testator was tricked into signing without realizing what the document was. In fraud in the inducement, someone fed the testator false information that caused them to change their estate plan, such as lying about a family member’s behavior to get that person disinherited. Forgery involves faking the testator’s signature or fabricating the document. Forgery cases almost always require a forensic document examiner to compare the questioned signature against known authentic samples.
A Newer Valid Will Exists
Sometimes the older will isn’t defective, it’s just been superseded. If a more recently executed will surfaces after an older one has been submitted to probate, the newer document controls. Properly drafted wills include language revoking all prior versions, so proving the newer will was validly executed is usually enough to displace the older one.
The Filing Deadline Is Short
Every state imposes a deadline for filing a will contest, and missing it means you lose the right to challenge no matter how strong your evidence is. The window varies widely, from a few weeks to several years after probate begins. The most common range is three to six months from the date the will is admitted to probate or the date you receive formal notice. A handful of states tie the deadline to other procedural milestones instead of setting a fixed number.
These deadlines are unforgiving. Courts rarely grant extensions for adults who simply didn’t act fast enough. Some states allow extra time for minors, incapacitated individuals, or cases involving newly discovered fraud, but those exceptions are narrow. Consult a probate attorney early, before the estate’s administration moves past the point where a challenge is practical.
Evidence That Matches the Ground
The evidence you need tracks the ground you’re asserting. A scattershot approach wastes money and credibility.
For capacity claims, medical records are the backbone. Hospital records, cognitive assessments, dementia diagnoses, and prescription histories from the period surrounding the signing carry the most weight. Testimony from treating physicians, caregivers, or family members who interacted with the testator around that time fills in the picture. A doctor’s note from six months before signing isn’t as persuasive as one from the same week.
For undue influence, the evidence is more circumstantial. Emails, text messages, and phone records showing a pattern of control or isolation matter. Financial records revealing unusual transactions or new dependency on the alleged influencer help. Statements from friends or relatives who saw the testator being cut off from their support network are powerful. If the alleged influencer picked the drafting attorney or was present during the drafting itself, that fact alone can be devastating.
For improper execution, the focus is on the signing ceremony. Tracking down the witnesses and getting their account of what actually happened is the first priority. If a witness wasn’t physically present when the testator signed, or if a witness was also a beneficiary, the will’s validity is in serious jeopardy. For forgery cases, a forensic handwriting examiner compares the disputed signature against known authentic examples. These experts typically charge $200 to $400 per hour, with courtroom testimony running $1,800 to $3,000 per day.
No-Contest Clauses Can Cost You Your Inheritance
Some wills include a no-contest clause, sometimes called an in terrorem clause, that penalizes any beneficiary who challenges the will. The penalty is typically forfeiting whatever inheritance the will would have given you. If you’re set to receive $200,000 and you contest unsuccessfully, you could walk away with nothing.
Enforceability varies significantly by state. Most states enforce these clauses but carve out a probable cause exception: if you had a reasonable basis for believing the will was invalid, the clause won’t be used against you even if your challenge fails. The standard is whether the evidence would lead a reasonable person to conclude there was a substantial likelihood of success. A few states refuse to enforce no-contest clauses at all, treating them as against public policy because they can shield genuinely fraudulent wills from scrutiny.
The practical effect is that no-contest clauses are most dangerous for beneficiaries who already stand to inherit something meaningful. If the will leaves you $500, you have almost nothing to lose by challenging it. If it leaves you $500,000, a failed contest could cost you every penny. Get a candid assessment of your evidence before filing.
What a Contest Costs
Will contests are expensive, and the costs fall primarily on the challenger. Attorney fees for contested probate matters typically run $250 to $450 per hour, and total legal bills commonly reach $10,000 to $50,000 or more depending on the complexity and whether the case goes to trial. Expert witnesses, filing fees, deposition costs, and document production add to the total.
The general rule is that each side pays its own legal fees regardless of who wins. The executor defending the will is usually reimbursed from the estate because defending it is part of the job. The challenger typically bears their own costs. Courts do have discretion to order the estate to pay a challenger’s fees in some situations, particularly when the challenge was brought in good faith and uncovered actual wrongdoing like fraud or forgery, but counting on that outcome is a gamble.
Some probate attorneys will take will contests on contingency, collecting a percentage of any recovery instead of billing hourly. This arrangement is less common than in personal injury work, and attorneys are selective. If a lawyer won’t take your case on contingency, that tells you something about how they view your odds.
What Happens If the Will Is Thrown Out
A successful challenge doesn’t necessarily send the estate into free fall. What happens next depends on what other estate planning documents exist.
If a previous version of the will was never properly revoked, the court may reinstate it as the governing document. A doctrine called dependent relative revocation can help here: if the testator revoked an earlier will only because they were creating a new one, and the new one turns out to be invalid, courts can treat the revocation of the old will as ineffective, on the theory that the testator would have preferred the old will over no will at all.
If no prior valid will exists, the estate passes under state intestacy laws, which follow a fixed hierarchy. The surviving spouse and children are first in line, followed by parents, siblings, and more distant relatives. That default order may look nothing like what the testator intended, which is exactly why courts don’t invalidate wills lightly.
Courts can also invalidate only part of a will. If undue influence or fraud tainted specific provisions but not the whole document, a judge may strike the affected sections and leave the rest in place. Partial invalidation is less common than an all-or-nothing ruling, but it’s available when the tainted provisions can be separated from the will’s overall scheme.