Yes. This is an unavoidable part of playing casino games online in the UK. Casinos have to comply with Know Your Customer (KYC) regulations to help prevent money laundering and other criminal activities. It can be a hassle, but try to think of the greater good. Do be aware that this is mandatory. Most of the top UK online casinos will not allow you to play until you have completed this process. You’ll need a government-issued ID and a recent proof of address document such as a bank statement.