Your Registration and Membership Book is VALUABLE and should be included with the purchase/sale of your boat.
If you’ve lost yours or it did not come with a used boat you’ve purchased and you need a replacement book, you can purchase it by contacting the Opti World Secretary General.
International Optimist Dinghy Association
8 Deans Lane,
Staffordshire ST5 6BU,
Fax: +44 1782 801222