It's simple but sounds complex so hang in there.

More than likely you found this site because you saw a fiver with the web address on, and when you entered the serial number on it, you saw who the note belonged to.

That person, let's call him Bob, paid £2.50 - the price of a pint of warm beer - to register that particular note, and will earn £2.00
if you decide to register a note of your own.

That means when another nine people, like you, who see the note and
register their own fivers, Bob will earn himself £20.

That's £20 from ten people, and just think, the average five pound note changes hands 55 times every day, every week, every month.

If all those people register their own note, which doesn't even have to be a fiver, anything with a serial number will do, Bob will earn £36,960 for doing absolutely nothing!!!

If 100 of those people register, that's two hundred quid.
If only two people register, well, that's your money back.

Geddit?