An executor cannot change a will before the testator’s death. The named executor has no legal authority over the document, the estate, or the testator’s decisions while the testator is alive; those powers only exist after death and only once a probate court formally appoints them. Until then, being named executor is just that: a name on a page.
Why a Named Executor Has No Authority Yet
An executor’s job is to manage an estate after the testator dies: gathering assets, paying debts and taxes, and distributing what remains to the beneficiaries. None of that activates while the testator is living. The testator still owns everything, still makes every decision, and can revoke or rewrite the will at any time without asking the executor.
This is true even when the executor is a spouse, an adult child, or the testator’s own attorney. Being named in the will creates no legal relationship with the will or the estate during the testator’s lifetime. The executor cannot read confidential provisions, access the testator’s accounts, or influence how the will is structured. If the testator decides tomorrow to name someone else, the original executor has no standing to object.
Only the Testator Can Change Their Own Will
The power to modify a will belongs exclusively to the person whose estate it governs. Not a family member, not a beneficiary, not a legal representative, and not the executor. A will is a personal statement of what the testator wants done with their property after death, and letting anyone else edit those instructions would defeat the point of having one.
To exercise that power, the testator needs testamentary capacity: they must understand what property they own, who their natural heirs are, and how the will distributes that property, and they must be able to hold those pieces together in a coherent plan. Most states also require the testator to be at least 18.
Making a Codicil
A codicil is a separate document that amends an existing will. It can add provisions, remove them, or update details such as swapping in a new beneficiary or a new executor. To be valid, a codicil generally must be in writing, signed by the testator, and witnessed by at least two people. Codicils were once standard for small changes, but many estate planning attorneys now steer clients away from them because a separate amending document can cause confusion and disputes during probate, especially if it contradicts the original will in ambiguous ways.
Writing a New Will
For anything beyond a minor tweak, a new will is usually the cleaner route. The new document should state explicitly that it revokes all prior wills and codicils. Under the Uniform Probate Code framework followed in many states, a later will that makes a complete disposition of the estate is presumed to replace the earlier one entirely; if it only covers part of the estate, it is presumed to supplement the old will and revoke only the provisions that directly conflict. Execution requirements match the original: written, signed by the testator, and attested by at least two witnesses, or notarized in some jurisdictions.
Physically Destroying the Will
A testator can revoke a will by burning, tearing, or obliterating it, provided the destruction is intentional and done to revoke. Someone else can perform the physical act only in the testator’s presence and at their explicit direction. An accidental shredding does not count, and neither does destruction by another person acting on their own. The testator must have the same mental capacity required to make a will in the first place.
What About an Agent Under a Power of Attorney?
No. This is one of the most common misunderstandings in estate planning. A power of attorney gives an agent broad authority over financial and legal matters, but that authority stops at testamentary documents. An agent cannot create, modify, or revoke the principal’s will.
The limitation holds no matter how broadly the power of attorney is drafted. Even a general or durable POA granting sweeping financial authority does not reach the will. If an aging parent’s estate plan needs updating, the parent has to do it personally while they still have the capacity to do so. A POA agent cannot step in and handle it for them.
What If the Testator Loses Capacity
Once a testator can no longer understand the nature of their property or the effect of changing their will, they lose the ability to modify it. The will as it stands at that moment is essentially locked in. Families often collide with this reality when the existing will no longer reflects the testator’s current relationships or finances.
In narrow circumstances, a court-appointed conservator or guardian can petition the court to modify an incapacitated person’s estate plan through a process called substituted judgment. The conservator does not act alone. They file a petition, and the court decides whether the proposed changes match what the incapacitated person would have wanted based on their known values, prior statements, and established patterns of giving. Courts approach these petitions cautiously, and approval is far from guaranteed. The practical lesson is to update an estate plan while healthy enough to do it personally, because the alternatives are expensive, uncertain, and slow.
What the Executor Actually Does, and When
Once the testator dies and the probate court validates the will, the executor’s responsibilities finally activate. Those duties come down to carrying out the testator’s wishes exactly as written. The executor inventories assets and determines their value, pays outstanding debts and taxes, files the deceased person’s final tax returns, and distributes the remaining property to the named beneficiaries.
The executor owes a fiduciary duty to the estate, the highest standard of care the law imposes. They must act in the best interests of the estate and its beneficiaries, not their own. A court that finds an executor breached that duty can reverse their actions, remove them from the position, or order them to personally compensate the estate for losses they caused. Crossing into criminal conduct, such as stealing estate funds, adds potential jail time to the civil exposure.
Fiduciary duty means following the will’s terms. An executor who distributes assets differently than the will directs, even with good intentions, is breaching that duty. The executor is a manager, not a decision-maker, and does not get to second-guess the testator’s choices, before death or after.
What Happens If Someone Alters a Will Anyway
Any change made to a will by someone other than the testator, or by the testator without following proper execution formalities, is legally void. Marginal notes, crossed-out names, and handwritten amendments added to a typed will accomplish nothing legally and can make things worse by creating ambiguity about the testator’s intent.
When a court finds unauthorized alterations, it tries to determine and enforce the original provisions. If the original text is still legible beneath the changes, the court upholds the unaltered version. If the alterations have made portions of the will impossible to read or interpret, the court may disregard those sections. In the worst cases, where tampering is so extensive that the will cannot be reliably reconstructed, the estate may pass under intestacy laws instead, distributing property to surviving spouses and close blood relatives by statutory formula rather than by anything the testator chose.
Deliberately altering, forging, or destroying someone else’s will is not just a civil problem. In most states, it is a felony. Forgery of a will typically carries classification as a serious felony with potential prison time and substantial fines, and fraudulently destroying or concealing a will is treated similarly. Exact penalties vary by state, but courts tend to impose harsher sentences when the tampered document affects legal rights after someone dies. Beyond criminal charges, a person who tampers with a will can face civil lawsuits from beneficiaries who were harmed.
So if you are the named executor and you see something in the will you would change: you cannot, and you should not try. Your role begins after death, and it begins with following the document exactly as the testator left it. If the testator is still living and the will needs updating, only the testator can make that happen.