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Do You Have to Keep Every Document Once You Anticipate a Lawsuit in Ontario?

What Ontario's document preservation duty covers once a lawsuit is reasonably anticipated, and what routine deletion is still fine in the meantime.

Litigation5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • You do not need an actual lawsuit filed against you to trigger a preservation obligation.
  • The obligation is not to keep every document a business or person has ever created.

A dispute is brewing — a customer is threatening to sue, an employee has hired a lawyer, or a business relationship is falling apart in a way that smells like litigation. At the same time, your normal operations do not stop: emails still get archived, old files still get purged, and backup systems still cycle through their routine schedules.

That raises a real question: does document retention once litigation is anticipated in Ontario mean you have to freeze everything? The short answer is no — but the scope of what you must keep is broader, and more important, than many people assume.

What "Reasonably Anticipating Litigation" Actually Means

You do not need an actual lawsuit filed against you to trigger a preservation obligation. Once a dispute reaches the point where a reasonable person in your position would expect litigation is likely — a formal demand letter, a threat to sue, a serious complaint with a lawyer involved — courts generally expect you to start protecting relevant records from that point forward.

This is a judgment call, not a bright-line test tied to a specific date or document. When in doubt, treat the obligation as having already started rather than waiting for certainty.

Before vs. After: What Changes

Before Litigation Is AnticipatedOnce Litigation Is Reasonably Anticipated
Routine deletion schedulesGenerally fine to continue as normalShould be paused for anything relevant to the dispute
Auto-archiving/backup cyclingNot a concernMay need to be suspended for relevant accounts or files
Employee device/email wipesStandard IT practiceShould exclude anyone connected to the dispute
Day-to-day, unrelated recordsNo special treatment neededStill no special treatment needed
Communications about the dispute itselfKept as a matter of courseMust be actively preserved

What the Preservation Duty Actually Covers

The obligation is not to keep every document a business or person has ever created. It applies to records that are relevant to the dispute — or reasonably likely to become relevant — including:

Unrelated material — routine business records with no connection to the dispute — is not swept into the obligation just because a different matter is heading toward litigation.

What Routine Deletion Is Still Fine

Practical Steps: Putting a Hold in Place

  1. Identify who is likely to have relevant documents — specific employees, departments, or systems.
  2. Send a clear, written notice (a "litigation hold") telling them what to preserve and why.
  3. Suspend auto-delete and auto-archive settings for the relevant accounts, folders, or devices.
  4. Keep a record of what steps were taken and when, in case the process itself is questioned later.
  5. Revisit the hold periodically as the dispute develops — it may need to expand, or can eventually be lifted.

Frequently asked questions

What happens if relevant documents are deleted anyway?

A court can take that seriously — sometimes drawing a negative inference against the party responsible, or imposing other consequences. Outcomes depend heavily on the specific facts, including whether the deletion looks accidental or deliberate.

Does this apply to individuals, or only businesses?

Both. An individual expecting a dispute — over a contract, a workplace issue, or a personal injury — has the same basic obligation to preserve relevant records as a business does, just usually on a smaller scale.

How long does the preservation duty last?

Generally for as long as the documents remain relevant to a live or reasonably anticipated dispute, which can mean well beyond the point a claim is actually filed. A lawyer can help you figure out when it becomes reasonable to resume normal retention practices.

Do I need special software to preserve documents properly?

Not necessarily. For most individuals and smaller businesses, clear instructions, suspended auto-deletion, and organized backups are enough. Larger organizations with complex systems sometimes need IT involvement to implement a hold properly.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario 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 licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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