Use Form I9 to verify the identity and employment authorization of individuals hired for employment in the United States. Nevada Employment Offer Letter Template.Utilize our job offer letter template to outline the specifics of a job offer extended to a successful candidate. US work visas requires the prospective employer to first file a petition with U.S. Citizenship and Immigration Services (USCIS). You must file Form I-765 and obtain the Employment Authorization Document if your presence in the United States requires you to apply for permission to work. An employer has to want to hire you for a job that qualifies for a visa. However, keep reading if you're interested in finding out how employment offer letters work. "This offer is contingent on meeting all employment authorization and applicable regulatory immigration requirements before your start date.