Trustworthy online casinos not only have a European license (or even a German license from Schleswig-Holstein), but also clearly disclose their bonus terms. This means, above all, that in addition to the coupon code, the deposit and play limits and the turnover conditions are also visible. These statements should be clearly and unambiguously set out in both the bonus terms and the terms and conditions. You must pay attention to these points with the casino bonus:
Wagering Requirements (How often do you need to spend both bonuses and deposits to withdraw any winnings?)
Maximum payout on winnings (especially the no deposit bonus or free spins)
Set limits I: You can not use your free bonuses in jackpot slots, but normal deposit bonuses are.
Set limits II: Often you are not allowed to set maximum bets with free offers. Sometimes, but not always, the slot machines or the free spins are blocked for maximum bets on no deposit play. So you should be careful and never play with money maximum bets!