Generally, you can revoke a will by (1) destroying the old will, (2) creating a new will or (3) making changes to an existing will. In some circumstances, simply giving away all or your property and assets before you die can have the effect of revoking a will (subject to estate tax penalties).

What makes a will legally valid?

For a will to be valid, the testator must be of sound mind. Generally, this means that the testator must be an adult, 18 or older, and be conscious and aware of what they are doing. Some states also require that the testator have an understanding of the disposition of the assets in the document.

What automatically revokes a will?

A will is automatically revoked when the will-maker marries, unless the will was made in contemplation (anticipation) of marriage, whether a particular marriage or marriage in general (section 12). There are new exceptions if you are married at your death to the person you have made a disposition to under your will.