Learn how U.S. companies can hire foreign independent contractors, covering legal aspects, benefits, and compliance tips. Having a written independent contractor agreement is a fundamental element of successfully managing this relationship.The equivalent form for overseas contractors is W8BEN. One essential form for overseas contractors is Form W-8BEN. You can register electronically using MyTax Illinois, available at mytax.illinois.gov. An independent contractor agreement is a contract between a freelancer and a client outlining work specifics. The University desires to obtain services from the Independent Contractor as more particularly described herein (hereinafter referred to as the Services). II. Is an independent contractor written agreement sufficient to classify workers as independent contractors? Signature of contractor. Independent Contractor.