What is required for any change to an employment contract?

A change to an employment contract requires consent from both parties involved in the agreement. This is because contracts are based on mutual agreement, meaning both the employer and the employee must agree to the new terms for them to be enforceable. Changes to an employment contract can include modifications to salary, job responsibilities, work schedule, or other significant aspects of employment.

If only one party were to unilaterally decide on a change, it could lead to disputes or claims of breach of contract, since both parties have a legal interest in the terms of their agreement. Thus, ensuring that both the employer and the employee give their consent to any changes is critical for maintaining the contractual relationship and avoiding legal complications.

In the context of the other options, while written notice from an employer might be necessary for formal communication, it does not replace the need for consent from both parties. Similarly, notification to a third party is generally irrelevant in the context of contract modifications unless specific circumstances require it. Having consent from either party alone is insufficient to modify an agreement.