Life changes. So should your estate plan. But that doesn't always mean you need to start from scratch and write a whole new will. For smaller, more targeted updates, Texas law provides a useful tool: the codicil to a will.
Think of it as a legal "P.S." or an addendum to your existing Last Will and Testament. It allows you to make specific changes without tearing up the entire document. This guide is designed for Texas families, executors, and heirs seeking clear, compassionate guidance on how to properly amend a will.
What Is a Codicil and When Should You Use One?

In plain English, a codicil is a legal document that modifies, adds to, or revokes a part of an existing will. Imagine your will is a detailed blueprint for your life's legacy. If you decide to change a minor detail, like the brand of fixtures in one bathroom, you wouldn't redraw the entire set of plans. You'd create a small, formal amendment for that single change. A codicil works the same way for your will, leaving the rest of the original document completely intact.
For many Texas families, it’s an efficient and cost-effective way to keep their estate plan current with life’s small shifts.
When a Codicil Makes Sense
So, when is a codicil the right move? It’s ideal for minor adjustments that don't fundamentally change your overall estate plan.
Here are a few common scenarios where a codicil is a perfect fit:
- Changing your Executor: The person you originally chose as your executor—the one responsible for carrying out your will's instructions—might have moved away, passed on, or is simply no longer the right fit. A codicil can appoint a new one.
- Updating a specific gift (bequest): Perhaps you want to leave a family heirloom watch to a different grandchild or add a new cash donation to a local charity.
- Adding or removing a beneficiary for a minor asset: You want to leave a modest sum to a new great-niece, or perhaps remove a small gift you'd previously planned.
- Appointing a new guardian for minor children: If your chosen guardian's circumstances have changed, a codicil lets you name a successor, ensuring your children are cared for by the person you trust most.
The Legal Roots and Modern Reality of Codicils
The idea of amending a will isn't new. Codicils actually trace their roots back to Roman law, where codicilli were used as informal postscripts.
But this is modern Texas, and the rules are much stricter now. For the families we serve at The Law Office of Bryan Fagan, it’s critical to understand that a codicil to a will must follow the Texas Estates Code to the letter. An improperly executed codicil will be rejected by the court, potentially leading to family disputes and complications during the Texas Probate Process. Our firm helps families navigate the requirements for both Wills & Trusts to ensure any changes you make are legally sound.
Deciding between a codicil and a new will can be tricky. This table breaks down common situations to help you see when a codicil is typically the better choice.
Quick Guide on When to Use a Codicil
| Situation | Is a Codicil Appropriate? | Reasoning |
|---|---|---|
| Swapping out an executor | Yes | This is a simple administrative change that doesn't alter asset distribution. |
| Adding a small cash gift | Yes | A codicil is perfect for minor bequests that don't impact the overall estate plan. |
| Getting married or divorced | No | Major life events like these fundamentally change your estate and require a new will. |
| A beneficiary has passed away | Maybe | If it’s a minor beneficiary, yes. If it's a primary heir, a new will is safer. |
| Removing a major asset | No | Substantially changing your asset lineup often requires re-thinking the whole plan. |
| Correcting a typo | Yes | A codicil can easily fix a minor error, like a misspelled name or incorrect address. |
Ultimately, a codicil is a tool for precision. It's for making small, targeted adjustments. For sweeping changes, it's almost always better to start fresh with a new will to avoid any potential for conflict or confusion down the road.
The Formal Steps to Create a Valid Texas Codicil
Creating a codicil might sound simpler than drafting a whole new will, but in the eyes of Texas law, it’s not. For a codicil to a will to be legally binding, it must follow the exact same strict rules as the original will it’s meant to change. These formalities, outlined in the Texas Estates Code, are crucial safeguards designed to prove the document truly reflects your wishes and to protect you from fraud or undue influence.
If you miss a step, your intended changes could be declared invalid. This can create confusion and even spark conflict for your family during the already difficult Texas Probate Process.
Let's walk through exactly what Texas law requires.
The Foundational Requirements
At its core, a valid Texas codicil must satisfy three essential conditions, as laid out in Texas Estates Code § 251.051. Think of them as the three legs of a stool—if any one is missing, the entire structure collapses and your codicil will fail in court.
- It Must Be in Writing: An oral promise or a casual conversation about changing your will has zero legal weight. The codicil has to be a physical, written document.
- It Must Be Signed by You (The Testator): The "testator" is the legal term for the person making the will. You must sign the codicil yourself. The only exception is if another person signs it on your behalf, but they must do so in your presence and under your direct instruction.
- It Must Be Attested by Two Credible Witnesses: This is a make-or-break step. Two witnesses, who are at least 14 years old and not beneficiaries in the will, must sign the codicil in your presence. They are there to legally attest that you were the one who signed it.
The "Sound Mind" Requirement
Beyond the ink and signatures, Texas law demands something more: you must have testamentary capacity when you sign the codicil. In plain English, this just means you have to be of "sound mind."
A person has testamentary capacity if they can understand:
- The action they are taking (that they're amending their will).
- The general nature and size of their property.
- The people who would naturally inherit from them (their family or other close relations).
- How all these pieces fit together into a coherent plan for distributing their assets.
This standard protects vulnerable individuals and ensures the changes made are a true reflection of their own wishes—not the result of confusion, pressure, or a diminished mental state.
A Real-World Scenario: Changing a Guardian
Let’s look at a common situation our firm handles. A few years ago, our Houston client, Sarah, created a will with her husband, naming her sister as the guardian for their two young children. Recently, her sister took a long-term job overseas. Sarah wants to name her brother, who lives in Austin and is very close to her kids, as the new guardian. This is a perfect situation for a codicil.
Here’s our step-by-step guidance on how we would help Sarah make this change:
- Drafting the Codicil: First, we’d draft a formal codicil that clearly identifies Sarah’s original will by its date. The document would state something direct like, "I hereby revoke the appointment of my sister, Jane Doe, as guardian and instead appoint my brother, John Smith, as guardian for my minor children."
- Arranging the Signing: Next, we’d schedule a meeting at our office. Sarah would come in, and we would provide two disinterested witnesses—for example, two of our staff members who are not named in her will.
- The Execution Ceremony: In front of both witnesses, Sarah would declare that the document is a codicil to her will. She would then sign it. Immediately after, the two witnesses would sign the document in her presence.
- Safekeeping: Finally, we’d provide Sarah with the original executed codicil and advise her to store it securely with her original will. It's critical that both documents are kept together.
By following these formal steps, we ensure Sarah’s wish to change the Guardianship of her children is legally bulletproof, giving her peace of mind.
Deciding Between a Codicil and a New Will
After a big life change, it’s completely normal to look at your will and wonder if it still says what you want it to say. This is where many Texas families get stuck: is a simple update using a codicil to will good enough, or is it time to draft a whole new will?
Making the right call here is about more than just paperwork. It's about preventing confusion for your family and making sure your final wishes are crystal clear, especially during a time of grief.
Think of a codicil as a quick patch—perfect for fixing a small, specific issue. A new will, on the other hand, is like starting fresh with a new set of blueprints. It’s the right move when major life events have completely changed your family or financial picture.
When a Codicil Is Usually Sufficient
A codicil is your best friend when the change you need to make is small and self-contained. It’s an efficient way to make a minor adjustment without having to tear up your entire estate plan and start over.
You might want to use a codicil for situations like these:
- Changing an Executor: Maybe the person you originally named as your executor has moved away, passed on, or just isn't the right person for the job anymore. A codicil can easily swap in a new appointee.
- Updating a Specific Gift: You’ve decided to leave your grandfather’s watch to a different nephew or want to change the cash amount you’re leaving to a favorite charity.
- Adding a Small Bequest: A new great-niece was born after you wrote your will, and you want to leave her a small gift without changing the core distribution of your estate.
- Correcting a Minor Error: You’ve spotted a simple typo, like a misspelled name or an old address, that needs fixing.
In these cases, a codicil is a straightforward and cost-effective fix. It lets you zero in on the one thing you want to change while leaving the rest of your will intact.
When a New Will Is the Safer Choice
When life throws you a major curveball, a codicil often isn't enough. Trying to patch a will after a significant event can lead to a messy, confusing jumble of documents. This kind of ambiguity is a recipe for family conflict and potential Probate Litigation.
That’s why, in these situations, we almost always recommend drafting a brand new will. It provides one clear, authoritative document that leaves no room for doubt.
Major events that call for a new will include:
- Marriage or Divorce: A change in marital status completely upends your legal landscape and who your primary heirs are. A new will is essential to reflect your new reality and formally cut ties with any provisions related to a former spouse.
- Birth or Adoption of Children: Welcoming a new child into the family requires a total rethink of how your assets will be divided and, just as importantly, who you want to name as their guardian.
- Significant Financial Changes: A massive inheritance, the sale of a family business, or a huge jump in net worth can fundamentally alter the structure of your estate.
- Death of a Major Beneficiary: If a primary heir—like your spouse or one of your children—passes away, you need to completely reconsider your entire distribution plan.
To help you decide, here’s a quick guide comparing the two options based on common life changes.
Decision Guide: Codicil or New Will?
| Factor to Consider | Best for a Codicil | Best for a New Will |
|---|---|---|
| Change Type | Minor, isolated updates (e.g., changing an executor) | Major life events (e.g., marriage, divorce, birth of a child) |
| Complexity | Simple, single-issue changes | Multiple, complex, or overlapping changes |
| Clarity | Can create confusion if multiple codicils exist | Provides a single, clear, and final document |
| Risk of Conflict | Higher, as amendments can be challenged or misinterpreted | Lower, as it revokes all previous wills and codicils |
| Cost & Effort | Generally less expensive and faster for small changes | More involved initially, but safer for significant updates |

As the flowchart shows, the legal requirements for a codicil—being of sound mind, putting it in writing, and signing it in front of two credible witnesses—are identical to those for a will. This is exactly why it often makes more sense to just start fresh when making significant changes.
Creating a new will serves another critical purpose: it explicitly revokes all your old wills and codicils, leaving just one authoritative document behind. If you want to learn more, check out our guide on how a new will supersedes an old will in Texas. It's the cleanest and safest way to protect your family from the stress and expense of a will contest down the road. Planning ahead with clear Wills & Trusts is one of the kindest things you can do for the people you love.
Common Mistakes That Can Invalidate Your Codicil
A codicil can be a handy tool, but it’s a legal document that demands precision. Even a small error can render it invalid, meaning a probate court will disregard it completely. When a codicil to a will is thrown out, your original will stands exactly as it was, which can lead to heartbreak and serious family disputes.

At The Law Office of Bryan Fagan, we've seen too many well-intentioned changes fall apart because of simple, avoidable errors. Here are the most common traps that Texas families fall into.
Forgetting the Formalities
By far, the most frequent mistake is treating a codicil like an informal note. People think that because it’s just a small change, it doesn't need the same legal ceremony as the original will. That assumption is a critical misunderstanding.
In Texas, your codicil must be executed with the exact same formalities as a will. If not, it’s worthless. This means you must avoid:
- Missing or Improper Witnesses: Just like a will, a codicil needs to be signed in front of two credible witnesses who are at least 14 years old and, importantly, are not beneficiaries in the will. Using a beneficiary as a witness is a classic, fatal mistake.
- Handwritten Changes on the Original Will: Never grab a pen and start crossing things out or scribbling in the margins of your will. These DIY edits have zero legal weight and can even raise questions about whether the entire will has been tampered with.
- Failure to Sign: It sounds obvious, but it happens. If you don't sign the codicil—or if your witnesses don't sign it in your presence—it’s automatically invalid under the Texas Estates Code.
These formalities aren't just red tape; they are the legal guardrails that prove your intent. If you're ever fuzzy on the rules, our guide on what invalidates a will in Texas dives deeper into these requirements.
Using Vague or Contradictory Language
A codicil has one job: to make a clear, specific change. When the language is foggy or creates a conflict with the original will, you’re creating a legal mess that a judge will have to untangle.
For instance, you write a codicil saying, "I want my niece Sarah to have my car." But your original will already states that "all my vehicles" go to your son. Now there’s a direct contradiction. Who gets the car? This kind of ambiguity is a breeding ground for family feuds and expensive probate litigation as everyone argues over what you really meant.
A Cautionary Tale: The Estate of J. Paul Getty
Another major pitfall is creating too many codicils. While one or two updates for minor life changes might be fine, repeatedly piling on amendments creates a confusing, fragmented estate plan. The chaotic estate of oil tycoon J. Paul Getty is a perfect cautionary tale.
Between 1958 and his death in 1976, Getty executed a jaw-dropping 21 codicils to his will. This tangled mess of updates, exceptions, and reversals turned his estate into a legal nightmare. His heirs were stuck in court for years, spending millions on legal fees just to sort through the contradictory documents.
Risks for Vulnerable Individuals
Finally, codicils are prime targets for legal challenges, especially when they involve an elderly or ill person. A last-minute codicil that dramatically shifts inheritances—like cutting out children in favor of a new caregiver—is a massive red flag for a probate court.
This is where claims of undue influence (being pressured) or lack of capacity (not being of "sound mind") come into play. Aggrieved family members will almost certainly fight it, arguing the person didn't understand what they were signing or was manipulated. Proving the codicil is valid in these situations can be an uphill battle, adding immense stress and division to an already difficult time. This is precisely why getting professional guidance is the best way to protect your final wishes from being challenged.
How Codicils Are Handled During the Texas Probate Process
So, your loved one has passed away, leaving behind an original will and one or more codicils. How do these separate documents actually work together when it's time to settle the estate? Understanding how the court system handles this can bring a lot of clarity and peace of mind to a grieving family.
When your chosen executor starts the probate process, they have a legal duty to present all testamentary documents to the court. This means the original will and every single codicil to a will ever signed must be submitted. The judge then reads these documents together as one single, consolidated set of instructions.
The Codicil Becomes Part of the Will
Think of it this way: your will is the main chapter of a book, and each codicil is a formally approved edit stapled to it. The probate court doesn't get to pick and choose; it has to review the entire collection to understand your final wishes.
Under the Texas Estates Code, both the will and any codicils must be proven valid before the court can act. Once the judge is satisfied they are authentic, the court will grant the executor official authority, known as Letters Testamentary. This power is based on the combined instructions of the will and all its codicils.
For example, if your original will names Person A as executor, but you later signed a valid codicil naming Person B instead, the court will appoint Person B. The codicil, being the most recent instruction, overrides the original text.
What Happens If a Codicil Is Lost?
This is where things can get messy. A lost codicil can cause serious problems and might mean your final wishes aren't honored.
Imagine your executor finds only the original will, but you had also created a codicil that dramatically changed a key provision—like who gets the house. In Texas, courts work under a presumption: if a will or codicil was last seen in the possession of the person who made it (the testator) and it can't be found, the court presumes it was intentionally destroyed or revoked.
This is exactly why meticulous record-keeping is so critical. Your executor and family absolutely must know where to find all of your estate planning documents. Keeping the original will and all original codicils together in a secure, accessible place—like a fireproof safe or with your estate planning attorney—is non-negotiable.
Scenario: The Late-Discovered Codicil
It happens more often than you'd think. Sometimes, a codicil surfaces well after the probate process has already started with just the original will. This can throw a major wrench into the proceedings.
Let’s look at a realistic scenario. Robert’s will is admitted to probate, and it leaves his entire estate to his two sons. Six months into the process, his daughter is cleaning out his old home office and finds a validly executed codicil tucked away in a desk drawer. This codicil specifically leaves Robert’s prized vintage car to her.
In a situation like this, the executor must immediately file that newly discovered codicil with the court. The judge will then schedule a hearing to determine if it's valid. If the codicil is proven to be authentic, the court will integrate its instructions into the ongoing probate, and Robert's daughter will get the car, just as he intended. Handling these complexities requires a deep understanding of the probate of a will in Texas.
Navigating Out-of-State and International Codicil Issues
In our increasingly connected world, it's not uncommon for Texas families to own property or have relatives living across state lines—or even in other countries. When your estate plan, specifically a codicil to your will, involves assets or heirs outside of Texas, you step into a complex legal web where Lone Star State rules may no longer be enough.

This is a critical point many people miss. Just because your codicil is valid here in Texas doesn't mean another state or country has to recognize it. This disconnect can create massive headaches for an executor simply trying to follow your wishes.
When Jurisdictions Collide
The legal system that governs wills and estates in Texas, known as common law, isn't universal. Many countries, especially across Europe and Latin America, operate under a completely different "civil law" system with its own strict requirements for estate documents.
For instance, many civil law nations mandate that wills must be prepared by a public notary and officially registered. A standard Texas-style codicil, signed with two witnesses, might be completely rejected in those jurisdictions. This could invalidate the changes you intended to make for any assets you own there.
You can explore the long history of wills and their amendments on the National Archives website.
Scenario: An Out-of-Country Property Problem
Let’s look at a real-world example. Imagine Maria, a Dallas resident who owns a beloved vacation home in Mexico. A few years after creating her Texas will, she decides to use a codicil to leave this Mexican property entirely to her youngest son, changing the original plan to split it among all her children. She has the codicil properly drafted and executed according to Texas law.
After Maria passes away, her executor—her eldest daughter—discovers a serious problem. Mexican law doesn't recognize the Texas codicil for transferring real estate. For the purposes of that foreign property, the amendment is invalid.
This forces the estate into two separate, expensive legal battles: a standard Texas Probate Process for her U.S. assets and a complicated, costly ancillary probate in Mexico to deal with the house. In the end, Maria’s wishes for the vacation home are ignored. The property is distributed according to her original will, creating predictable tension and disappointment within the family.
This scenario highlights the absolute necessity of getting expert legal advice for any estate that crosses state or national borders. At The Law Office of Bryan Fagan, our experience with complex estate matters helps Texas families with assets beyond state lines avoid these devastating pitfalls. We work to ensure their Wills & Trusts are structured to work wherever their legacy extends.
Takeaway: Make the Right Choice for Your Texas Estate
Estate planning can feel like a maze of complex rules, but understanding your options is the first step to securing real peace of mind for your family. The codicil to a will is a perfect example of a useful but often misunderstood legal tool.
A codicil is a precision instrument—built for making small, specific updates to your will. Need to swap out an executor or tweak a minor bequest? A codicil can get the job done efficiently. But don't mistake it for an informal note. It carries the full weight of the law and must be treated with the same seriousness as your original will, following all requirements under the Texas Estates Code.
For our Texas clients, we always preach a simple mantra: clarity and safety. While a codicil is fine for those minor tweaks, it's absolutely the wrong tool for big life changes. Getting married or divorced, welcoming a new child, or experiencing a major shift in your finances—these are not codicil moments. In those situations, the clearest and safest path is always drafting a new will. A fresh will wipes the slate clean, revoking all previous documents and leaving a single, authoritative roadmap for your loved ones.
Key Insight: The idea of a quick, do-it-yourself codicil is tempting, but the risk of getting it wrong is incredibly high. A simple mistake in wording or a slip-up during the signing ceremony can invalidate your changes. This can ignite the very family conflicts and expensive court battles you were trying to prevent.
Investing in professional legal guidance isn't just an expense; it’s an investment in your family’s future. It’s the ultimate protection, ensuring your legacy is preserved exactly as you intended, without leaving behind a legal puzzle for your family to solve during their time of grief. Securing your legacy is one of the most profound acts of care you can perform for your family. The compassionate attorneys at The Law Office of Bryan Fagan are here to guide you, whether you need to make a small change with a codicil or it's time to create a comprehensive new estate plan from the ground up.
If you’re facing probate in Texas, our team can help guide you through every step — from filing to final distribution. Schedule your free consultation today.