Validation Error is appearing when I try to sign up.

This message will appear on your screen if the information you have provided for Sign Up cannot be validated with our internal records. Please check the information you have provided. Boxes will turn green if information has been entered in the correct format. It does not indicate that the information is correct or matches what is on our records. If the box is red you need to ensure you have entered the details in the correct format.  E.g. 9 digit NI Number, DOB as DD/MM/YYYY. If the information is being entered correctly and you are still unable to progress, this would suggest that either your Surname, NI Number or DOB is held incorrectly on our records, therefore please contact the NILGOSC administration team on 0345 3197 325.