On the other hand, those applying for work visas might have to provide proof of relevant work experience and credentials in addition to a job offer from a reputable company ilwc slotsn the host nation. In addition, candidates frequently have to go through medical exams & background checks to make sure they fulfill security and health requirements. Preparation & investigation. Prospective applicants should carefully examine the eligibility requirements for the type of visa they want and the country where they plan to travel.