Errors may occur...

• when data is collected.
  (Eg. A person filling in a data capture form incorrectly)
• when data is transcribed - copied from one medium to another.
  (Eg. A code could be copied as 12435 instead of 12345)
• when data is input.
  (Eg. A person could spell his name incorrectly when typing it at a keyboard)
• when data is processed.
  (Eg. A program may have errors in it and process the data incorrectly to give the wrong results)
• when data is transmitted.
  (Eg. Data sent from one computer to another on a network may be corrupted due to a hardware fault.)

In March 2003 a person in Huddersfield was threatened with court action if he did not pay his electricity bill...it was for £2,320,333,681,613