If you have an invitation, click the link in the email to join. If you got an email confirming your membership, please Sign In in the "Sign Up / Sign In" box in this page.
To join WWOOF Costa Rica, click on the JOIN tab in the main menu and select "Costa Rica". If you are not a member of WWOOF Latin America, contact us at email@example.com
See more information: http://www.wwoofcostarica.org