Sorry, but you're wrong. Laws have *very* specific proscriptions and criteria for determining whether or not a given pictorial representation of currency is considered counterfeit, or just fake. For example, I could *legally* photocopy or scan and print $50 bills all day long (even double-sided) so long as the image is at least 150% normal size.
You are right about size and wrong about double-sided.
I didn't want to highjack this thread by getting too specific. However, anything close to real money even if it has a picture of Ronald Reagan or Harry Truman is a problem.
http://prairielaw.com/forums/p/28794/144767.aspx