After Death Planning: "Will Validity"

A will must meet certain formal requirements in order to be valid, otherwise it may be challenged during the probate process. These requirements vary from state to state. Generally, the person making the will (the "testator") must be an adult of sound mind, meaning that the testator must be able to understand the full meaning of the document. Wills must be written. Some states allow a will to be in the testator's own handwriting, but a better and more enforceable option is to have a typed or pre-printed document. A testator must sign his or her own will, unless he or she is unable to do so, in which case the testator must direct another person to sign the will in the presence of witnesses, and the signature must be witnessed and/or notarized. A valid will remains in force until revoked or superseded by a subsequent valid will. Some changes may be made by amendment (a "codicil") without requiring a complete re-write.