A will is revocable until the testator's death. The only exception to this occurs when two parties simultaneously make mutually irrevocable wills in which they name one another as their respective beneficiaries and expressly give up the right to revoke their wills. A testator may revoke his or her will by destroying it, either by burning or tearing it up, or by obliterating the signature. Any part or the whole of the will may be revoked by a codicil, or an amendment to the will, executed with the same statutory formalities as the will itself.
A valid later will revokes a prior will. Disposition of property by the testator before death, as by gift or sale, is not a revocation of the will, although its effect may be similar to one.
Marriage of the testator subsequent to the date of execution of the will revokes the will as to the surviving spouse or children, who are entitled to the same rights in the estate as if the testator had died intestate, that is, without leaving a will.