Phishing attacks are becoming more and more popular this days.

Phishing (via wikipedia):
“In the field of computer security, phishing is the criminally fraudulent process of attempting to acquire sensitive information such as usernames, passwords and credit card details by masquerading as a trustworthy entity in an electronic communication. ” (read more)

The messages received from an attacker is very similar to the companies messages and many customers end up in providing sensitive information to attackers.

I recently signed-up on a website, and upon registering it asked me a “Phishing protect key“, so every time I receive a communication from their business I will have a header similar to:

Anti-Phishing Key: “<custom text I entered on registering form>”
This information was inserted by you on your registration form. This “key” lets you verify that <Business> is the sender of this email and fight against the risk of phishing.

I think it’s a very simple and great idea to protect your customer from phishing attacks.