Yes - well, sometimes. If you play at an online casino licensed in the UK, you'll be required, by law, to verify your identity before you're able to deposit money and begin actually playing. This means that when it comes to making a withdrawal, you should have already completed the mandatory checks. However, if you use debit and credit cards to make your deposits, the casino may require you to upload additional proof of payment method - so it depends on which payment method you've chosen to use. If you're located outside the UK, then there's a strong chance you'll be asked to complete a KYC check upon making your first real money withdrawal.