There are a few key components to setting up W2 workers: EIN (employer identification number). International Independent Contractors are non-US-based service providers who perform a specific skill outside the usual scope of University activities.The main difference between a W8 vs. 9 form identifies whether the payee is a citizen, resident, or foreigner for income tax purposes. The first step is to have the contractor complete Form W9, Request for Taxpayer Identification Number and Certification. The W8 BEN is essentially the W9 for international workers. They invited me to attend conferences in The USA. It is an HR company. WORK. CONTRACTOR shall complete all Work as specified or indicated in the. Milestones: 1899–1913.