- Go to the website: https://account.optica.org/eWeb/DynamicPage.aspx?WebCode=LoginRequired&expires=yes&Site=OSAC
- Sign in or create an account
- Fill in the personal information
- Choose membership type: Student 1 Year
- Join our KNOF student chapter
- Proceed with the payment, try to use code CLEO-JOIN50 (or CLEO-RENEW50) to get the refund, pay 20$ (or 10$ in case the code works for you)
- Submit the reimbursement form at Reimbursements