KYC is an acronym for “Know Your Customer” and refers to documents that check the identity of a customer. Your casino will need to verify who you are, and make sure that you are the owner of the payment method you selected, and that your address details are correct. To do this, they will ask you for a copy of a government-issued identity document and a recent utility bill to prove that your address is correct. These documents are required by banking and casino industries to ensure that financial transactions are being directed towards the correct person and to try to prevent any illegal practices like money laundering.