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How and When to Notify Customers of a Change in Business Ownership in Ontario

What a customer notification letter should say after an Ontario business sale, when to send it, and whether it creates legal obligations for the buyer.

Buying & Selling a Business5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • For most retail and service customers, there’s no general legal requirement to send formal notice of a change in ownership.
  • Who bought the business and, if relevant, when the sale becomes effective.
  • There’s no single correct answer, and it often depends on the deal structure and confidentiality obligations in the purchase agreement itself.

Somewhere between signing the purchase agreement and opening the doors under new ownership, someone has to tell the customers. There’s no single law that spells out exactly how to do this, but how and when you notify customers of a change in ownership can affect goodwill, contract obligations, and even legal exposure if the wording promises more than the buyer intends to deliver.

This article walks through what a good notification generally covers, when to send it, and where wording can create obligations you didn’t intend.

Is Notifying Customers Legally Required?

For most retail and service customers, there’s no general legal requirement to send formal notice of a change in ownership. But that’s not universally true: some customer contracts, service agreements, subscriptions, warranties, or supply arrangements, include their own notice or consent requirements, particularly if the contract needs to be assigned to the buyer to continue. Whether notice is legally required, versus simply good practice, depends on what’s actually in your customer contracts.

What a Good Notification Letter Covers

  1. Who bought the business and, if relevant, when the sale becomes effective.
  2. What is, and isn’t, changing — hours, staff, pricing, location — so customers aren’t left guessing.
  3. What happens to outstanding commitments — gift cards, deposits, ongoing service contracts, warranties — stated clearly rather than left ambiguous.
  4. How to reach the business going forward, including any new contact information.
  5. A warm, professional tone that reassures customers the transition is planned and orderly.

Timing: Before or After Closing?

There’s no single correct answer, and it often depends on the deal structure and confidentiality obligations in the purchase agreement itself. Some purchase agreements restrict what either party can say publicly before closing actually happens, to avoid disrupting the business if the deal doesn’t close as planned. Many businesses time formal customer notice for at or shortly after closing, once the transaction is final, rather than while it’s still pending.

Legal Risks of How You Word It

This is where notification stops being purely a communications exercise. A few things worth being careful about:

A Customer Notification Checklist

Frequently asked questions

Do we have to honour gift cards or deposits issued by the previous owner?

This depends entirely on how the purchase agreement allocates liabilities between buyer and seller. It isn’t automatic in either direction. Confirm the specific treatment in your agreement before telling customers anything definitive.

Can the buyer send the notification letter, or does it have to come from the seller?

Either can work, and some businesses send a joint letter from both. What matters more than who signs it is that the content accurately reflects what the purchase agreement actually says about ongoing obligations.

What if a long-time customer has a service contract that says it can’t be assigned without consent?

That consent requirement needs to be addressed directly with the customer, generally before or at closing, rather than assumed away in a general notification letter. This is a common issue worth flagging during due diligence, not after the fact.

Is there a risk in saying too little to customers?

Saying too little can create its own problems, including confused or upset customers, assumptions that something is being hidden, or a scramble to communicate once customers notice the change on their own. A clear, timely letter is usually better than silence.

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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