Hiring international contractors can be useful but comes with challenges like IRS requirements or foreign labor laws. While there are fewer responsibilities when hiring contractors, you still need to comply with local laws, taxes and IRS filing requirements.This article will outline four steps for hiring international contractors overseas and how Wise can help cut costs on global payments. Unexpired government-issued passport from the applicant's country of residence and,; Intent-to-hire letter from a Utah-based employer. This guide will help you learn how to hire overseas contractors and pay them compliantly. How to hire overseas contractors in a foreign country. All US employers must properly complete Form I9 for every individual they hire for employment in the United States. This includes citizens and noncitizens. All US employers must properly complete Form I9 for every individual they hire for employment in the United States. This includes citizens and noncitizens.