When submitting Forms I864 or I134, an employment verification letter can help show that the beneficiary has adequate financial support. (APPLICANT'S STARTING DATE OF WORKING IN THE COMPANY) until present.An employer has to want to hire you for a job that qualifies for a visa. 1. Gather the applicant's full name, position, and passport number. In most cases, the process begins when the employer obtains an approved Application for Permanent Labor Certification from the U.S. Department of Labor (DOL). An employment verification letter for immigration (EVL) is one way to satisfy proof of employment requirements that are needed for various US visas.