1) Signed Independent Contractor Agreement (located below). 2) Completed Information Form (located below).Please fill out the following form completely. Having a written independent contractor agreement is a fundamental element of successfully managing this relationship. When a US company hires independent contractors who are US residents, it should have contractors complete Form W9. An independent contractor agreement is a contract between a freelancer and a client outlining work specifics. In that case, a US company should not withhold or report taxes. Pay contractors abroad with. APPLICATION: Please complete and submit two copies of form BCA 13.15 to apply for an Authority to Transact Business in Illinois. While in the Contractor's possession or use and the Contractor shall be responsible for restoring such CHA Documents at its sole expense.