Phishing

Phishing is a term used to describe the use of 'spoofed' e-mails and fraudulent websites designed to fool you into divulging personal financial data such as credit card numbers, account usernames and passwords, social security numbers, etc. It is claimed by industry experts that by hijacking the trusted brands of well-known banks, online retailers and credit card companies, phishers are able to convince up to 5% of recipients to respond to them.

There is an excellent list of do's and don't on this page: Anti Phishing Working Group