How To Help Leave a Legacy What if I change my mind? Many people put off making a Will in case they change their minds about legacies and bequests in later years. However, once you have made a Will, the original contents can be changed or added to by means of a Codicil and will not involve re writing your Will. The Codicil has to be signed and witnessed in the same way as the Will itself, although the witnesses do not have to be the same. The Codicil must be kept with, but not affixed to, your Will.