Many of the below forms now use a new format allowing you to electronically fill out, sign, print and save the document you requested. Contracts for services of an independent contractor require approval according to SAM 0107.How do I fill this out? Contractor must complete Form W-8BEN as Page 7 of this Agreement, and must include a notarized affidavit as page 10 of this Agreement, if applicable. Offices of the Transportation Services Authority. 75 Bank Street, Suite 1. A withholding agent sends Form 587 to an out‑of‑state independent contractor (vendor) before making a payment for services. How to fill out the Independent Agent Agreement for Transportation Services? Contract opportunities on SAM. Contracts are available thru Accounts Payable.