The SCUF Seal of Approval is found on the back of your controller (PlayStation). For Xbox, this number will be inside the paddle hatch or under the faceplate (if removable). This unique number will start with the following:
SCUF Vantage = A or B
SCUF Infinity1 = INX
SCUF Elite = ELT
SCUF Impact = IMP
SCUF Infinity 4PS Pro = INF
SCUF Prestige = XP
The SCUF Seal of Approval proves that your controller is tournament-legal and contains no modifications which would otherwise disqualify it for use in competition. It also validates your warranty and shows the controller has not been opened or tampered with.