An access code is a simple way to limit access to your campaign to players who have the code you chose.
An access code can be presented to the surfer. He has to insert a series of numbers that you determined in the creation of your campaign. If the insert is correct the participant can access the contest, otherwise he is blocked.
The activation of the access code is possible on the welcome step of your campaign under the textbox. Choose the code yourself. Pay attention! It is the only code that will be used by all participants.
You can also add unique codes to your campaign: unique codes can be used only once to play. This means players have to own a code that has not been used yet.