The Federal Employer Identification Number (FEIN) is a unique nine-digit number issued by the Internal Revenue Service (IRS) to identify businesses. It is used for tax identification purposes and is required on all government contract bids and procurement documents. In the procurement field, FEIN is essential for companies to be eligible to bid on Government contracts, receive payment from public entities, and comply with taxation regulations. Procurement officers should be aware of the importance of utilizing a company’s FEIN in order to protect their organization and meet legal requirements.