You can choose between a printed certificate or an electronic version. (The electronic certificate is in pdf format created by hand just like the printed certificate, but sent by email rather than post.)
Your name (unless you prefer not
to have it included*)
The name of your gift recipient
The number of acres that have been
saved
Which project your donation has
been earmarked for, if any
Date (and occasion if you have
specified one
*You will be able to choose certificate type when you donate.
The Standard type show your gift recipient's name
only; The Gift type show your name as well.
Save acres of rainforest or other wildlife habitats