A codicil is a supplement to a previous will that adds to, modifies, amends, or revokes one or more provisions of the earlier will. Laws regarding codicils vary from state to state and in some states a codicil may not replace an earlier will—but in some states it may.
In New Mexico, a codicil is a legal instrument that is used to make changes to an existing will. It can add to, modify, amend, or revoke provisions of the will without the need to draft a new will from scratch. However, for a codicil to be valid, it must comply with the same legal formalities that apply to the creation of a will. This means that the codicil must be in writing, signed by the testator (the person making the will), and witnessed by at least two individuals who are present at the same time and who also sign the document. It's important to note that while a codicil can make specific changes to a will, it does not replace the original will. Instead, it is read in conjunction with the will and is considered a part of the will's provisions. If there are any conflicts between the original will and the codicil, the terms of the codicil will generally prevail, provided that the codicil has been properly executed according to New Mexico law.