Bit of a shitter mate im a taxi driver and a lot of notes pass through my hands every week i take care with 10's and 20's to make sure there real but fivers i honestly couldnt care there the tatiests note ever ripped ect. If any one was to really think about it fivers are the ideal notes nobody bothers to check them as its only a fiver. There no fooling the uv lights although you can bypass the pens if u put some car wax on the paper then wipe it off still feels quite normal not that ive tried it.