YES, although it is very rare. Entry to the Emirates can only be approved by the Emirate migration authorities. In case your visa is rejected, your total payment will be refunded. It is imperative that your passport is NOT sealed from Israel. If that is the case, the migration authorities (even if they have granted their visa to the Emirates) could refuse entry to the Emirates. In case of having a seal of Israel in your passport we advise you to make a new passport and just manage the visa for the Emirates. Remember that women under the age of 25 must be accompanied by a parent or spouse.