Changes from offer letter in final contract

Is a contract valid if it's different from the offer letter?
By Brian Johnston
|Canadian Employment Law Today|Last Updated: 11/13/2013

Question: Can the employer make significant changes between a signed offer letter and the final employment contract?

Answer: It is clear that any significant changes between a signed offer and the final employment offer are generally prohibited. This has generally been the law since Francis v. Canadian Imperial Bank of Commerce, where the Ontario Court of Appeal said:

“The law does not permit employers to present employees with changed terms of employment, threaten to fire them if they do not agree to them, and then rely on the continued employment relationship as the consideration for the new terms.”