File both forms at the location specified for the other application or petition. For example, if you are filing Form I-765 with Form I-539 or Form I-485.US work visas, like the H1B and L1, need sponsorship from a US employer. Here's how the process works, and how much it costs. When submitting Forms I864 or I134, an employment verification letter can help show that the beneficiary has adequate financial support. Apply to Assistant Manager, Project Coordinator, Oracle Developer and more! A job offer is required and the U.S. employer must file an Immigrant Petition for Alien Worker, Form I-140, on behalf of the applicant. Apply to Network Operations Technician, Quality Technician, Installer and more! The individual who signs the affidavit of support becomes the sponsor once the intending immigrant becomes a lawful permanent resident. When asking for visa sponsorship in a cover letter, be direct and professional.