Rack your brains for a second on this one. What is the best way to validate guy's endowments online (without actually running over with a ruler :tongue. Of course, no system is completely foolproof, but think of the best one you can!
Have the website print out a page that has a grid on it...
Unfortunately that grid can easily be scaled smaller before being printed. Then it would would child's play to make the photo against that improper scale to fool you.
We don't all use the same currency!!!id use banknotes myself...
A CD is a good idea, but probably too small in diameter. Basically we're looking for a way to prove someone is at least 8 inches.