If you upgrade your account, you can access your digital membership card and introduction booklet on the website. 

Your membership card can be found by going to your profile: go to My Account > My Profile. Then scroll down until you find the tabs, and click on the tab "Membership Card". There, you can access your digital membership card, and also click on the link to download it in PDF-format. Free members do not have access to a membership card.

The introduction booklet can be download by going to My Account > My Upgraded Membership. Then click on "Upgraded Membership Downloads". There you can download the welcome letter for upgraded members, and the introduction booklet with tons of extra information about NOD and Druidism in general. Both documents are in PDF-format.