Using an United States Dollar bill as reference. I used the Photoshop rectangle, ellipse and custom shape tool to create shapes and moved them around.
Red box color changed so you can see the shape.
step 2 of 4
added the PXL dude icon from a user account that had no avatar.
step 3 of 4
Added text layers, tried to think of nifty things to add. (view full to read)
found web site creator 'Monty' and contest moderator 'madamemonty' on the PXLeyes Team web page and added their "fake signatures".
Named the no avatar dude "PXL".
Used the web page IP address for the "serial number".
step 4 of 4
Used a texture creator and added various textures and blended them with the various shapes and pictures to give a "printed" look.