Yes, Codicils are legally binding documents, provided they meet the necessary legal requirements of the jurisdiction in which they’re executed.
Codicil legal requirements
For a Codicil to be legally binding, it typically needs to adhere to the following guidelines:
Proper execution: You must execute a Codicil with the same formalities as a Will (i.e., it must be in writing, signed, and witnessed by two or more competent witnesses who are present at the same time).
Mental capacity: You must have the mental capacity to understand the nature and effect of the Codicil and the changes being made to your original Will.