For new employees, offer letters should also detail the employee's expected start date and any hiring contingencies (e.g. This guide is designed to help you understand how to compose a successful job offer letter in the UAE.Employment Offer Letter Instructions. 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. Of Homeland Security. It is illegal to work in UAE without work visa. Some companies make people work with visit visa, but if you are caught you have to pay fines and will be banned. You mean what are the things you should ask for from a job in Dubai. The job offer letter should be a result of an interview with some negotiations. School in the United Arab Emirates.