It is easy to withdraw from your Dunder account as long as you do not have pending wagering requirements to complete. You should also have completed the verification process. It is also required for you to wager a deposit at least once before it can be withdrawable.
To make a withdrawal request, you need to log in to your account first. Go to Your Account to look at your finances. Here you will see your payment method options. Choose your preferred option and follow the instructions as specified.