Log into your account and click on the tab that says "My GameDuell." You will see a list of the most important links directly beneath the "My Account and Winnings" headline. From here you can deposit and withdraw funds onto and from your account. Under the "Bank Statement" link, you can check your account transactions that took place within a specific time period of time.

A simplified overview of your account balance is displayed in the upper, right-hand corner at all times while logged in.