How can a will be deemed invalid under Ontario law?

A will can be deemed invalid under Ontario law primarily if it does not meet specific legal requirements regarding its execution, if the testator lacked the mental capacity to create a will, or if there was fraud involved in its creation.

Improper execution refers to failure to follow the formalities required by the Succession Law Reform Act, such as not having the will properly signed or witnessed. The testator must be of sound mind and capable of understanding the nature of making a will at the time they create it; if they lack capacity, the will may be challenged. Additionally, if the will is procured through fraudulent means—meaning that it was created under deception or coercion—the will can also be declared invalid.

This comprehensive legal framework ensures that a will reflects the true intentions of the testator and safeguards against invalid practices that could undermine the legitimacy of testamentary decisions. In the context of the other options, colored ink, registration with a lawyer, or simply changing one's mind do not, in themselves, invalidate a will under Ontario law.