Contract addendum template Quebec
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Free template to adapt to your situation: replace the sample information (names, addresses, dates, amounts, references) with your own.
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Addendum No. [___] to the [title of the contract]
Between: [Name of party 1], [address], represented by [name, title], hereinafter “[designation]”,
And: [Name of party 2], [address], represented by [name, title], hereinafter “[designation]”.
Preamble
On [date], the parties entered into a contract entitled “[title of the contract]” (the “Contract”). They wish to supplement it with the provisions below.
1. Additions to the Contract
The Contract is supplemented by the following clauses:
Section [number] – [heading]: [text of the new clause].
Section [number] – [heading]: [text of the new clause].
[Schedule [letter]: [title of the schedule], attached to this addendum.]
2. Effective date
This addendum takes effect on [date].
3. Effect on the Contract
This addendum forms an integral part of the Contract. All other provisions of the Contract remain unchanged. In the event of any inconsistency between the Contract and this addendum, this addendum prevails.
Signed in [city], on [date], in [number] copies.
[Party 1]: ______________________________ [Party 2]: ______________________________
Free, no sign-up. Replace the sample information with your own.
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Drafting notes
- Under the Civil Code of Québec, a contract may be amended only with the consent of all parties; one party cannot impose an addendum.
- If the original contract requires amendments to be in writing and signed, comply strictly with that formality.
- In a consumer contract, the Consumer Protection Act strictly regulates amendments made by the merchant.
- Have the addendum signed by the same signatories (or persons with equivalent authority) and number successive addenda.
How to use this template
- Download the letter in Word or PDF with the button above.
- Adapt it to your situation: your contact information, the recipient’s, the facts, dates and amounts.
- Send it and keep a dated copy.

About the author
Sonia Pin Legal counsel, business law
Sonia Pin is a legal professional specializing in business law and commercial litigation. She drafts and updates the contract and letter templates published on Avocat Montréal, with a focus on Quebec civil law (Civil Code of Québec) and the practical requirements of the courts and administrative tribunals.