If the employee is in the UAE, he must sign the offer letter before the employer can seek MoHRE's preliminary approval for his employment. Try to get in touch with HR they will guide you what is happening with your selection.Start a job offer letter with "Dear" and the candidate's first and last name. Let them know that your company is enthusiastic about the job offer. It depends on the company practice. From my experience, BCG and Bain only ask for background check after candidate accepts the offer. Based on your name and profile, I surmise your friend to be relocating countries and moving to UAE.