If modifications are necessary after creating a will, you may not want to make the changes on the original will. Depending on what you write on the will, you could invalidate the will, causing you to die intestate.
There are two options for modifying the contents of a will. One is by adding a codicil or addenda, which outlines the changes. Like the original will, a codicil must be signed in front of two witnesses. The other way to modify a will is simply to create an entirely new will with the changes included. This is the most common method used to modify wills.