I am creating another form for a Non-Profit that I volunteer for. They wanted me to create a contest where the person puts in their name, email, phone, and contest code. They wanted the 30th person to receive a message stating they won, but after working with GF's for the last year I don't think that will be possible. Anyways They only want the contestant to be entered into the contest once. I setup the Email and "code" field to not allow duplicate entries. I however wanted to go a step further and limit the user input for the codes. The promotion codes will be given out at an event so I was wondering if there was a way to setup the "code" field to only allow the codes that we created?