Many couples wish to leave their estates to each other when they die, and then to their children. They usually nominate the same people to act as their executors and trustees, typically each other, and one or more of their children may be appointed as substitutes.
Putting these intentions into writing in their individual will documents therefore contain identical terms, so that each document reciprocates the contents of the other. Lawyers commonly refer to these wills as “mirror wills” or reciprocal wills.
Making a valid will is important to its effectiveness. The word ‘valid’ in law means to be legally effective and having legal force.1 Who else needs to sign a will?
A will documents a person’s intentions for what they want to have happen when they die, see What is a will. It contains their instructions on who is to inherit their property and how, who will administer its disposal and any preferred arrangements for their funeral, . If their intentions are to be legally effective, and ultimately put into effect, the will needs to be valid and comply with the legal rules.