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.You can download our sample letter in PDF form here: Notification of Intent to Withdraw a Student. Please accept this request to cancel my current application for F-1 Optional Practical Training. You must also complete an Update Form above. If You then decide to withdraw from your Course within the Cancellation Period. If You then decide to withdraw from your Course within the Cancellation Period. Dear USCIS Officer: Please accept this request to cancel my current application for F-1 Optional Practical Training. If you wish to opt out from the start of your NHS employment you must complete form SD502 within the first month. In this notice, we explain how we collect, use, disclose, retain, and protect the information that we collect about you.