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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Wills & Estate Planning Ontario » Probate & Trust Administration Ontario » What to Do When the Deceased’s Name on the Will Doesn’t Match Their Ontario Death Certificate

What to Do When the Deceased’s Name on the Will Doesn’t Match Their Ontario Death Certificate

2 Jul 2026 4 min read No comments Probate & Trust Administration Ontario
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If a deceased person’s name on their will differs from their Ontario death certificate, the Superior Court of Justice will typically reject your probate application. You must file an Affidavit of Alias to legally prove both names belong to the exact same person. While the basic court filing fee is zero for the affidavit itself, the standard Estate Administration Tax still applies.

When you are appointed as an Estate Trustee in Ontario, you expect a degree of paperwork. But one of the most frustrating bureaucratic hurdles occurs when the deceased’s name on their last will and testament does not perfectly match the name on their provincial death certificate. This often happens because of omitted middle names, the use of a maiden name, or everyday nicknames used in legal documents decades ago.

In Ontario, the Superior Court of Justice is incredibly strict about identity. If the name on the will says “Robert J. Smith” but the death certificate says “Robert James Smith,” the court clerk may flag the file. Whether you are filing your Certificate of Appointment application in Mississauga, London, or Brampton, you must bridge this gap in identity. 📝 Fortunately, the legal solution is straightforward: you must prepare and swear an Affidavit of Alias. Working with a local probate lawyer is the best way to ensure this document is drafted correctly the first time.

Step-by-Step Process to Fix Name Discrepancies in Ontario

Correcting a name mismatch requires you to provide sworn evidence to the court that explains the discrepancy. Follow these steps to keep your probate application moving smoothly.

Step 1: Identifying the Discrepancy

Before you submit your application for a Certificate of Appointment of Estate Trustee, lay out all the deceased’s primary documents. Compare the original will, the Ontario death certificate, and their Social Insurance Number (SIN) card. If there is even a missing initial, you should proactively prepare an alias document to prevent court delays.

Step 2: Gathering Supporting Identity Documents

You need to gather alternative proof that both names belong to the deceased. This can include a passport, a driver’s licence, old Canada Revenue Agency (CRA) Notice of Assessments, or marriage certificates. These documents will be used as exhibits to prove that the deceased commonly used both variations of their name.

Step 3: Drafting the Affidavit of Alias

An Affidavit of Alias (also known as an Affidavit of One and the Same Person) is a sworn legal document. In it, you, as the executor, formally state that “Robert J. Smith” referenced in the will and “Robert James Smith” listed on the death certificate are the exact same individual. You will reference the supporting documents you gathered in Step 2.

Step 4: Swearing the Affidavit

You cannot simply sign the affidavit at your kitchen table. It must be sworn or affirmed under oath before a Commissioner for Taking Affidavits or a Notary Public in Ontario. Most local law firms can provide this service for a very small fee. ✍

Step 5: Filing with the Superior Court of Justice

Include the sworn Affidavit of Alias with your standard probate application package. When the court clerk reviews your file, they will read the affidavit, accept the explanation for the differing names, and proceed with issuing your Certificate of Appointment.

Common Document vs Name Variations

Reason for DiscrepancyWill Name ExampleDeath Certificate Example
Missing Middle NameMary TaylorMary Elizabeth Taylor
Maiden Name UsageSarah JenkinsSarah Jenkins-Smith
Nicknames / Shortened NamesBill DaviesWilliam Davies

How Much Does it Cost in Ontario?

Fixing a name discrepancy is generally quite affordable, provided it is caught early and handled proactively.

  • Notary Fees: If you draft the affidavit yourself and just need a Notary Public to commission it, expect to pay $40 to $75 CAD.
  • Lawyer Fees (Drafting): Having a probate lawyer draft a rock-solid Affidavit of Alias and bundle it with your application usually costs an additional $300 to $800 CAD.
  • Estate Administration Tax: Correcting the name does not change the EAT. You still pay 1.5% on estate assets over $50,000 CAD.

How Long Does the Process Take?

If you submit your probate application with a mismatched name and no Affidavit of Alias, the court will eventually send it back, which can delay the estate by 4 to 8 weeks. ⏳ However, if you proactively include the affidavit when you first file, it adds virtually zero time to the standard Ontario probate timeline (which generally takes 2 to 6 months depending on the local courthouse).

Frequently Asked Questions (FAQ)

Can I just cross out the wrong name on the will?

Absolutely not. You must never alter, write on, staple, or un-staple an original will. Doing so can completely invalidate the document in the eyes of the Superior Court of Justice.

Will the bank accept a mismatched death certificate?

Banks are extremely strict. If the name on the account does not match the death certificate or the probate document, the bank will freeze the funds until you provide a Certificate of Appointment that legally links the names.

What if the death certificate itself has a typo?

If the funeral home or the province made a genuine typo on the Ontario death certificate, you may need to apply to ServiceOntario to have the death certificate formally corrected, rather than just filing an alias affidavit.

Do I need an alias document for a missing suffix like ‘Jr.’ or ‘Sr.’?

Generally, yes. To avoid any risk of the court rejecting the application, it is best practice to provide an Affidavit of Alias for any discrepancy, including Jr., Sr., or Roman numerals like III.

Dealing with court rejections because of a simple name discrepancy is exhausting when you are already grieving. To ensure your probate application is approved on the very first try, consider reaching out to a local estate lawyer from our Ontario directory.

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