Changing a verbal contract

Can either side make change terms if there is no written contract?
By Brian Kenny
|Canadian Employment Law Today|Last Updated: 11/17/2010

Question: What are the obligations of both parties of an unsigned employment contract? If the contract was verbally agreed to, then changes were made with the consent of both, are the changes valid? Can the employer change the term of the contract without the employee’s consent after the employee starts working and can the employee leave before the term is up?