There is no minimum donation amount associated with becoming a WWF member, however there is a $5 minimum required for membership renewal. All donations (even those that originate from Panda Nation events and the WWF Gifts Center) qualify to create or renew a WWF membership.
Membership cards are not sent via mail, but members should expect an emailed confirmation/thank you for their gift if they gave online, or a mailed acknowledgement if they gave offline or requested a thank you gift. Additionally, members who sign up for WWF emails with a valid email address at the time of their donation will receive a monthly e-newsletter.
Member Services will assist you if you would like to join over the phone with your credit card. The WWF Web site also provides several links for secure online membership donation, such as WWF Gifts Center, Monthly Supporter, Gift Planning, Gift Membership, and Partners in Conservation.
Additionally, you can send a check donation to us at:
World Wildlife Fund
1250 Twenty-Fourth Street, N.W.
P.O. Box 97180
Washington, DC 20090-7180