A Canadian Demand Letter is a formal written communication from one party to another requesting payment of a debt, performance of a contractual obligation, or cessation of wrongful conduct. The letter serves as a pre-litigation notice that documents the sender's claim, specifies the amount owed or remedy sought, sets a deadline for compliance, and warns of legal action if the demand is not met. Canadian courts view demand letters favourably as evidence that a party attempted to resolve a dispute before commencing litigation.

The demand letter serves critical legal functions under Canadian law. In many provinces, sending a demand letter is a practical prerequisite to commencing a Small Claims Court action — judges frequently ask whether the plaintiff made a written demand before filing. Provincial Small Claims Court limits vary significantly: Ontario allows claims up to CAD $35,000, Alberta up to $50,000, British Columbia up to $5,000 (with the Civil Resolution Tribunal handling claims up to $5,000), and Quebec up to $15,000. For claims exceeding these limits, the demand letter becomes part of the pre-litigation record in Superior Court proceedings.

A demand letter also has important implications for limitation periods. Under Ontario's Limitations Act, 2002 (S.O. 2002, c. 24, Sched. B), the two-year limitation period begins when the claim is discovered or ought to have been discovered. A demand letter creates documentary evidence of when the creditor asserted the claim. In Quebec, the Civil Code (CCQ art. 2880) provides a three-year prescription period for most personal actions. The demand letter also establishes the date from which pre-judgment interest begins to accrue under provincial Courts of Justice Acts.

A Canadian Demand Letter is needed whenever one party owes money or an obligation to another and informal attempts to resolve the matter have failed. The most common scenario is an unpaid invoice — a contractor who completed renovation work but has not received payment, a consultant whose invoices are overdue, or a supplier whose shipments were accepted but not paid for. The demand letter formalizes the payment request and creates a written record that the debtor was put on notice.

Demand letters are essential before commencing legal proceedings. Filing a claim in Small Claims Court without first sending a demand letter can work against the plaintiff — the court may question whether the plaintiff made reasonable efforts to settle the matter. In Ontario, paralegals and lawyers routinely send demand letters as a first step in the collections process. The letter should give the debtor a reasonable deadline to respond — typically 10 to 30 days — before legal action is initiated.

Beyond debt collection, demand letters are used for breach of contract claims (demanding specific performance or damages), property damage claims (demanding repair costs or compensation), return of security deposits by landlords, and cease-and-desist demands for ongoing wrongful conduct. A well-drafted demand letter that clearly states the legal basis for the claim, the amount demanded, and the consequences of non-compliance resolves many disputes without the need for court proceedings — saving both parties thousands of dollars in legal costs and months of litigation.

An effective Canadian Demand Letter must identify the sender and recipient with full legal names and addresses. The letter should be sent by a method that provides proof of delivery — Canada Post registered mail, courier with signature confirmation, or email with delivery receipt — because proving that the letter was received is essential if the matter proceeds to court.

The factual basis for the demand must be stated clearly and specifically — the date and nature of the agreement or obligation, what the other party was required to do, how they failed to perform, and the damages or losses that resulted. Reference specific contract provisions, invoices, or other documents that support the claim. State the exact amount demanded in Canadian dollars, including a breakdown of the principal amount, interest accrued (at the contractual rate or the pre-judgment interest rate under the applicable provincial Courts of Justice Act), and any costs or expenses.

Set a clear and reasonable deadline for compliance — typically 10 to 30 business days from the date of the letter. State the specific consequences of non-compliance: filing a claim in Small Claims Court (specifying the applicable provincial court), commencing a Superior Court action, reporting the debt to credit bureaus (Equifax Canada, TransUnion Canada), or assigning the debt to a collection agency licensed under provincial regulations such as Ontario's Collection and Debt Settlement Services Act. Include an offer to negotiate — courts look favourably on parties who demonstrate willingness to settle. The letter should be dated and signed, with a governing law reference to the province whose laws apply to the underlying dispute.