Students have to provide proof of address when they register for the school. An Illinois State Board of Education affidavit can also be used as proof of residency.Edu and click on "Profile," then select "Proof of Residency Documents," upload approved documents listed below to your portal. Provide the appropriate information and check each of the following: I am at least 18 years of age. I have provided proof in the form(s) of. Legal proof may come from a court document or a state document. Children who did not attend District 187 the previous year are considered "new" and must provide proof of residency. One from category 1: Real Estate Tax Bill.