Typically, the process can take anywhere from two to six weeks. This guide is designed to help you understand how to compose a successful job offer letter in the UAE.Employment Offer Letter Instructions. Form required of new employees to verify identity and employment eligibility can be filled out online and saved or printed. 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. STAGE 1 OFFER LETTER: The offer letter and its annexures contain important details of the job and both parties must sign these documents.