To unlock level 1 (Standard), you will need to submit a valid government ID or Passport and a clear selfie photo. For UK users, a Driving License or Passport can be accepted as valid ID verification documents. Make sure that all the details you have entered during your registration are correct. If one type of ID is not working, it may help to try an alternative one from the suggested types. Remember to take a clear shot of both the front and back of the ID card. For passport take a shot of the page including your photo and personal details.