Case snapshot
At a glance
- Case
- Can an Estate Trustee Be Forced to Produce Third-Party Documents in Ontario?
- Court / Tribunal
- Ontario Superior Court of Justice
- Citation
- 2026 ONSC 3794 ↗
- Date
- June 29, 2026
- Area of law
- Wills Estates
- Key issue
- Whether an estate trustee in Ontario litigation can be compelled to produce documents held by third parties — including financial planners and lawyers — on the basis that those documents are within the trustee's possession, power, or control.
- Outcome
- The motion was partly granted: the financial planner's file was ordered produced, lawyer files were not found to be within the client's control, and requests for decades-old bank and tax records were dismissed for failing to establish that those records still exist.
- Why it matters
- If you are a beneficiary in an estate dispute, this decision clarifies exactly which third-party records you can demand from an estate trustee — and which battles are not worth fighting at the discovery stage.
Legal principle
The rule from this case
Under Ontario's Rules of Civil Procedure, a party to litigation must produce documents that are in their possession, power, or control — not just documents they physically hold. A client's relationship with a professional can bring that professional's file within the client's 'control' for discovery purposes, but only where the client has a genuine right to demand those records. A financial planner's file, for example, falls within a client's control because the client retains the right to access and request those records at any time. Lawyer files are treated differently. Internal memoranda, work product, and other materials generated by a lawyer for their own purposes are considered the lawyer's property, not the client's. A client does not automatically have the right to demand the entirety of a law firm's file. If a party in litigation wants those documents, the proper route is a third-party production order under Rule 30.10 of the Rules of Civil Procedure — a higher procedural bar that requires a separate motion.
Important limits
What this does not mean
This decision does not mean an estate trustee can hide behind third parties to avoid all document production. Where a professional relationship genuinely gives the trustee the right to access records — as with a financial planner — those records are treated as within the trustee's control and must be disclosed. The ruling is not a blanket shield for estate trustees. The decision also does not establish that old bank or CRA records are always beyond reach. The court's refusal to order production of records from the late 1990s was based on a lack of evidence that those specific records still exist — not a legal rule that historical financial records can never be produced. If a party can demonstrate that old records actually exist, the analysis may lead to a different result.
Can an Estate Trustee Be Forced to Hand Over a Financial Planner’s File?
Yes — if the estate trustee is also the financial planner’s client, the planner’s file is generally within the trustee’s control and must be produced in Ontario estate litigation. In Mehta v. Mehta, 2026 ONSC 3794 (CanLII), the Ontario Superior Court of Justice confirmed that a financial planner’s records fall within a client’s control because the client has a standing right to access and retrieve those documents. The court ordered production of the financial planner’s file, finding the request proportional and not unduly burdensome.
This matters in estate disputes because beneficiaries often suspect that key financial decisions were made through advisors whose records the estate trustee would prefer to keep private. This ruling confirms that those records are not off-limits simply because a third party holds them.
Does an Estate Trustee Have to Produce Their Lawyer’s Files?
No — not automatically. The court in Mehta v. Mehta applied the principles from Aggio v. Rosenberg and confirmed that a client does not have an automatic right to the entirety of a lawyer’s file. Internal memoranda and work product prepared by a lawyer for the lawyer’s own purposes belong to the lawyer, not the client. That means those documents are not within the client’s “control” for discovery purposes under the Rules of Civil Procedure.
If a beneficiary or opposing party wants to obtain a lawyer’s file in estate litigation, the proper route is a motion for third-party production under Rule 30.10. That is a separate and more demanding step — it requires its own motion and a higher justification. Simply asking the estate trustee to produce their counsel’s file will not be enough.
What Happens When Historical Bank or Tax Records No Longer Exist?
A party seeking production of documents must first establish that those documents actually exist. In Mehta v. Mehta, the court applied the principle from Sarta v. Mazo and dismissed requests for bank records from 1997 and CRA records from the same era because there was no evidence those records still exist. The court also found that historical estate tax filings had not been proven to exist.
This is a practical but important hurdle. Decades-old financial records are often purged by institutions under their own retention policies. Before spending litigation resources fighting for production of very old documents, a party should investigate whether those records are actually available — otherwise the motion will fail at the threshold stage.
What Does “Proportionality” Mean in Ontario Document Discovery?
Proportionality means the burden of producing documents must be reasonable relative to the importance of those documents to the case. Ontario’s Rules of Civil Procedure (Rule 29.2.03) require courts to weigh the cost and effort of production against its likely value. In Mehta v. Mehta, the court found that demanding records from multiple banks spanning several decades was disproportionate at the affidavit of documents stage — even if some of those records might theoretically exist.
The financial planner’s file, by contrast, was found to be proportional: it was a discrete set of records from a single source, directly relevant to the issues in the estate dispute, and not unduly burdensome to gather. Proportionality is assessed file by file, not as a blanket rule.
What Is the Difference Between Possession, Power, and Control?
These three concepts define the full scope of a party’s disclosure obligation under Rule 30.01 of the Rules of Civil Procedure. “Possession” means you physically have the document. “Power” means you have a legal right to obtain it on demand. “Control” is the broadest concept — it captures situations where you have a practical ability to access or retrieve documents even if you don’t currently hold them.
In estate litigation, this distinction is critical. An estate trustee may not physically hold every document relevant to the estate’s history, but if they have the right to call for those records — as a client can with a financial planner — the law treats those records as within their control. Our Ontario wills and estates lawyers regularly advise clients on how to use these rules strategically in estate disputes.
Practical Takeaways for Beneficiaries in Estate Litigation
- Target financial advisors first. If the estate trustee used a financial planner, those records are likely within the trustee’s control and producible — pursue them early in the discovery process.
- Don’t expect lawyer files without a separate motion. A trustee’s legal counsel files are not automatically producible; you will need to bring a Rule 30.10 third-party production motion with proper justification.
- Prove existence before demanding old records. Before moving for production of bank or tax records from decades ago, investigate whether those records still exist. A motion that can’t clear the existence threshold wastes time and money.
- Proportionality cuts both ways. Courts will reject requests that sweep too broadly — focus your production demands on discrete, high-value document sets rather than blanket requests across multiple institutions and time periods.
- Get advice before the affidavit of documents stage. Discovery strategy in estate litigation is set early. Speaking with our Burlington wills and estates team before your affidavit of documents deadline can prevent costly mistakes.
UL Lawyers offers a free initial consultation from their Burlington office and serves clients across Ontario. If you are involved in an estate dispute and need guidance on document production or your rights as a beneficiary, reach out to our wills and estates legal team to discuss your situation.
This article is automated commentary on a public court decision and is for general information only — not legal advice. Decisions rely on facts unique to each case. If you are affected by a similar issue, contact a lawyer for advice specific to your situation.
FAQ
Frequently asked questions
Yes. Under Ontario's Rules of Civil Procedure, an estate trustee must produce documents within their possession, power, or control — including records held by third parties like financial planners if the trustee has a right to access them. Documents held by lawyers are treated differently and require a separate court motion.
A Rule 30.10 motion is a court application to compel a third party — such as a law firm — to produce documents that are not within a party's control. It requires its own motion and a higher level of justification than a standard production request directed at a party to the litigation.
There is no fixed time limit, but a party requesting very old records must first show that those records actually still exist. Courts have dismissed requests for decades-old bank and tax records where no evidence was provided that the records had been retained by the institution or the CRA.