This is a email that I got from the NCEL . I asked them about the Pick 4 as well as the Missing 4 digit!!!
Thank you for sending us your question.
The North Carolina Education Lottery plans to have Pick 4 in late spring of this year.
The security and integrity of all of our games are of utmost importance. Many steps are taken to ensure the integrity. The 4’s has not been removed from the balls.
An external auditor is present at every drawing, (Pick 3, Cash 5 & Powerball) and the ball set and draw machine are randomly selected before each drawing in the presence of the auditor. Tests are conducted before and after the live drawing, and the draw team reviews the numbers selected to sure that there are no patterns or sequences of numbers. If repeat numbers are noted, the ball set will be replaced and three additional tests will be conducted. If at anytime during the draw process the external auditor notes anything at all that concerns them, they can call the drawing foul and a new drawing will be conducted with a new ball set and new draw machine. The ball sets are weighed and checked periodically and there are back-up sets that can replace any ball set that the draw team or auditor has concerns about. Again, the integrity of our games is very important to the NC Education Lottery.
Thank you for playing.
NC Education Lottery