The equivalent form for overseas contractors is W8BEN. If you contract with a foreign company or selfemployed workers who operate under a business entity, you'll need to collect IRS Form W8BENE.Understand tax requirements when hiring a foreign contractor. Our guide provides essential insights for seamless compliance with international tax laws. The first step is to have the contractor complete Form W9, Request for Taxpayer Identification Number and Certification. The agreement should contain language specifying a contractor relationship, not an employeremployee agreement. Income Agreement for Independent Contractors. For vendor set up in DustyBuy, your contractor will also need to complete and submit one of the following forms -. A foreign independent contractor is a nonU. If you are hiring a foreign contractor, you will need to have them complete IRS Form W8BEN.