For free no deposit spins or other bonus offers, online casinos have certain wagering requirements that players must first meet before they can withdraw. These requirements must be enforceable, otherwise one quickly gets the idea that the work here may not be fair. The rollover amount must be 20-50 times the amount of the bonus, but no higher, otherwise it quickly becomes difficult to wager that much money before the bonus period expires. This period should include a sufficient number of days. 30 days is ideal, but 20 days may also be an acceptable period.