A will codicil is an amendment to a testator's Last Will and Testament. This document is not intended to be a new will that will replace an existing one. Instead, it makes some change to the existing document. A codicil to a will may change the person who is appointed as executor, change the amount of a gift to a beneficiary, or exclude a specific beneficiary altogether. When a will codicil is presented in probate courtholographic will. Contact a will lawyer to consult your case.