why was your friend blacklisted from Abu Dhabi? if he was just blacklisted, all it would take is for him to present a ticket back to home country, and he can get out of jail and directly to the airport. but if he has a pending case in Abu Dhabi, then it is not a simple case of being blacklisted, but the case has to be settled and resolved. in which case, you need to find an arabic lawyer who can help him. you can actually search on the internet, or, go to the Indian association in Sharjah to seek for legal assistance. your friend's first action should have been to contact this agency in Sharjah or your country's embassy as they would be able to refer him to a lawyer if he has a pending case. if he is simply blacklisted, you can buy him a ticket and he can get out of the country - but he will not be allowed to come back.