Sample Refusal (Opt Out) Letters. This page has links to opt out letters for the tests New York STATE gives to 3rd-8th graders every spring.Refusal letters should go to the school principal. Copies can also be given to the teacher and the superintendent. You can write your own letter or use our sample letter. Opting-out is the process of refusing to participate in state and district testing programs for grades 3-8. Parents can write and submit a refusal letter. The applicant must be opposed to all vaccinations in any form. All Harris students are also subject to the policies and regulations of the University, as outlined in the University of Chicago Student Manual.