The first step is to have the contractor complete Form W9, Request for Taxpayer Identification Number and Certification. Make sure to collect a completed and signed Form W8BEN from the contractor before sending them any payment.If you are hiring a foreign contractor, you will need to have them complete IRS Form W8BEN. What are the Withholding Requirements for Payments to Foreign Independent Contractors? This form certifies the contractor's foreign status and can help reduce or eliminate withholding tax on payments. The equivalent form for overseas contractors is W8BEN. You have no obligation to withhold taxes for your foreign independent contractors. Otherwise, you could be subject to IRS penalties like steep fines and interest.