Your vote is not officially cast until after you see the "Your vote has been recorded" screen on the scanner after inserting your ballot. At that point, it is no longer possible for you to make any changes. However, if you change your mind before you cast your ballot, you can change your selections. When using the ballot marking device, a ballot review screen appears before you print your ballot. This screen lists all the choices you have made and lets you know if you missed voting in any race. From this screen, you can return to any contest on the ballot and change your selections, if you wish. If you want to change your ballot selections after you have hand-marked or printed your ballot, you can ask a poll worker to "spoil" the ballot and issue you a new ballot up to three times.