I came across this set on flickr called "Credentials" where Least Wanted has scanned old passports, ID cards, work permits, exam cards and other "official" docs (in several languages). It's such an amazing collection - both historically as well as philosophically - to see how we try to regulate aspects of society. I love this collection!
I found it via 16 Sparrows who has created a downloadable version of the PI card that I found via Design Freebies.