What is “testamentary capacity”?

The testator of a will has “testamentary capacity” when he possesses the mental capacity to understand:

• that she is creating a will,
• the effect of making a will (the disposition of her property after she dies),
• the “nature and extent” of her property,
• the identity of her next of kin and other “natural objects of her bounty”.

Her mind must also be able to form reasonable judgments.