IMMSANE Pay back membership feesUse this page to pay any outstanding IMMSANE membership fees from previous years below. IMMSANE pay back membership fee IMMSANE Individual Membership (one year, back membership fee) €50.00 Add To Cart IMMSANE Institutional Membership (one-year, back membership fee) €250.00 Add To Cart IMMSANE Student Membership (one - year, back membership fee) €25.00 Add To Cart