A codicil is a supplement to the existing will and must be executed and attested to with the same formalities of a will. If major changes are desired in a will, it is better to revoke it and make a new one. A will should be reviewed periodically, especially when there are changes in family or financial situations. Yes, a person can make his or her own will. However, self-made wills can create problems.
Many words have special meaning in the law.
When these words are used by a layperson, the results may not be those intended. Children have no vested interest in their parent's property. However in North Carolina, a spouse cannot be disinherited under a will. A divorce after a will has been written does not revoke the will. The divorce does, however, revoke all provisions in the will in favor of the divorced spouse.