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How to File a Caveat to Stop Probate of a Will in New Brunswick

Learn how a caveat works in the New Brunswick Probate Court, how long it lasts, the 10-day Form 3D deadline, the fees, and which grounds can support a challenge.

Wills & Estates4 min readTSLBy the Treadstone Law Team · New BrunswickUpdated November 13, 2026
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Key takeaways
  • A caveat against a grant may be lodged with the Registrar or a probate office clerk, and no proceedings can be taken on the application without notice to you.
  • A caveat lasts six months unless it is withdrawn, vacated or a notice of intent to contest is filed, and you have ten days after receiving a warning to file that notice in Form 3D.
  • Being disappointed or left out of a will is not a ground to challenge it on its own.

You may think a will is not valid, and you may be worried that the Probate Court of New Brunswick will grant Letters Probate before anyone hears your concerns. A caveat is the tool the Probate Rules provide to give you a voice before that happens.

This article explains in plain terms what a caveat is, where it is lodged, how long it lasts, what you must do if you receive a warning, and what grounds can really support a challenge. Every estate is different, so a lawyer can confirm how these steps apply to you.

This article covers the law of New Brunswick.

What a caveat is and where you lodge it

A caveat is a formal notice against a grant. Its purpose is to stop the Court from moving ahead on an application for Letters Probate without telling you first. Letters Probate are granted on a will and officially recognize the executor's authority.

A caveat against a grant may be lodged with the Registrar or with a probate office clerk. Once it is in place, no proceedings may be taken on the application without notice to the caveator.

How long a caveat lasts and the 10-day deadline

A caveat remains in force six months after it is lodged, unless it is withdrawn, vacated, or a notice of intent to contest is filed.

The deadline that matters most is this one: if you receive a warning, you must file a notice of intent to contest in Form 3D within ten days of receiving it. Treat that date as firm and get advice quickly if a warning arrives.

Fees and what happens next

A caveat, or a notice of intent to contest, costs $25. Starting a contested claim or proof of a will in solemn form costs $50.

The Court may make interested persons parties to proof of a will in solemn form or to revocation proceedings. Proof in solemn form is a more formal way of proving the will, and it is where a dispute is tested.

If you are served with a citation and do not file a notice of intent to contest, you are not entitled to notice of further proceedings. While the validity of a will is pending, the Court may appoint an interim administrator, who cannot distribute the residue.

Grounds that can support a challenge

Being disappointed or excluded is not itself a ground to challenge a will. You need a recognized reason, and the reasons that come up fall into three kinds: formal defects under the Wills Act, revocation under the Wills Act, and common-law grounds.

The formal defects and witness gifts rest on the Wills Act. Revocation by marriage also comes from the Wills Act. The common-law grounds are decided by common-law principles. On capacity and knowledge and approval, the person putting forward the will carries the burden, which shifts back if suspicious circumstances arise. Fraud or undue influence must be proved by those attacking the will. Some wills are valid despite missing formalities, such as a holograph will wholly in the testator's handwriting and signed, and a court may declare a document valid as a will if satisfied it embodies the deceased's testamentary intentions.

What to do next

Frequently asked questions

Where do I file a caveat in New Brunswick?

A caveat may be lodged with the Registrar or a probate office clerk. Applications themselves go to the probate office for the judicial district where the deceased lived or where their property was located.

How long does a caveat last?

It remains in force six months after lodging unless it is withdrawn, vacated, or a notice of intent to contest is filed. Because the period is limited, plan your next steps early.

What happens if I miss the ten-day deadline after a warning?

You must file a notice of intent to contest in Form 3D within ten days of receiving the warning. Get advice quickly if you are close to the deadline.

Can I file a caveat after probate has already been granted?

How the Court treats a caveat filed after a grant has already issued should be confirmed with the Clerk. The Court can recall or revoke Letters Probate, so a lawyer can explain which route fits your situation.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. New Brunswick laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in New Brunswick. Reach us at 1-844-900-1070 or send our Team a message.

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