Is there any value in doing your codicil in blood? A codicil is an amendment to a will. They can be used when there is a smaller change and it seems easier than doing a whole new will. Is there a time and place for a codicil? Yes, if no one is going to be mad and challenge the change that you've made.If you're changing beneficiaries, or executors, and they're going to be upset, you need to do a whole new will. For more information, visit the show notes at http://bigpictureretirement.net/082