New members - A membership year runs from 1 January - 31 December

To become a member (never before a member of ISI or of one of ISI Associations) you have to register. When registered, you will receive an email with a login code to the webshop. Fill in your contact details and then go to the 'Shop'. Click on a membership to see all the membership options. Choose your membership and proceed to pay. When paid, wait to be redirected back to the shop and you will receive your receipt including your membership number. Should you require any assistance, please send an email to

Existing and former members

If you are currently an ISI and/or ISI Association member or have been in the past and you would like to renew, reinstate or add a membership/s you can log in to the webshop, you don't have to register. If you don't know your username please send an email to