Why is the five pound note important?
17 March 2011 Last updated at 12:08 GMT
The £5 note is made from cotton and rag - but finding one in a cash machine is like gold dust.
The Bank of England has been running a campaign to get more fivers in circulation.
But figures obtained by the BBC show the number of ATMs that give them out remains tiny.
Shoppers in Brighton told the BBC why they think the fiver is so important.