All admitted international students must complete the DCF, even those not pursuing sponsorship from UIC. Kindly fill out the form.A filing fee is required for many immigration forms. If you do not submit the correct fee, we will reject your form. Submit Required Online Check-In Form to OIA. Fill out the online check-in form within 5 business days of arrival in Chicago. Call us at 800-236-8866 during our regular customer care hours. Commercial banking clients can call our dedicated business customer care line at 800-728-3501. Contact Us. General Info; Debit and Credit Cards; Loans; Mortgage. The application form must be signed and filled out in print.