The process is pretty simple, all you need to do is send a withdrawal letter to USCIS requesting them to withdraw your application. Your letter must contain your full name, date of birth, case number, current address, and a straightforward request to cancel your application.It's your spouse's application you can withdraw it. Learn what a withdrawal letter is, how to write a letter of withdrawal and see a template and an example to help you write your own. Either send USCIS a letter to request withdrawal of case or go to interview and present the withdrawal letter to IO. You must complete and submit IRS Form W-8BEN along with your application. Make sure to address the withdrawal letter to the right USCIS office that is currently processing your application. The written request to withdraw the Form I864 should be sent in hard copy to the appropriate consulate contact information can be found here. It was the 130 and 864 forms that I withdrew in a letter after seeing my partner's true colors and don't want move forward with her. New York State Unified Court System.