Verifying your account is one of our licensing requirements under the UK Gambling Commission, we are licence bound to validate your identity at some point.
Rest assured your documents are held on an encrypted secure server.
Essentially, we wish to secure your funds and want to be certain that we are paying out your winnings to yourself and nobody else. We also need to be sure that the deposits you have made to your account have come from legitimate sources. This is all to avoid certain situations - for example, if someone were to use your credit card on their gaming account without your permission or knowledge and then transferred the funds to their own bank account.