Again, when I am confronted by a scam, I pass it on to you. Recently I received an email purportedly from American Express thanking me for updating my email address and then indicating an email address for someone other than me. The email goes on to say that if the email address indicated is not correct, I should click on a link provided in the email to change it. This is an example of the scam called phishing. The phony email looks very legitimate, but there are a few tell tale signs that it is a fake, most notably the fact that the email supposedly sent specifically to me indicates that the same email was sent to about twenty other people, which makes no sense whatsoever. If I had clicked on the link I would have downloaded malware that could have resulted in my becoming a victim of identity theft.
Never click on a link in an email no matter how official the email looks unless you are absolutely positive that the email is legitimate. In cases such as this, the prudent thing to do if you have any thoughts that it might be legitimate is to call American Express or whomever the legitimate entity is that is purporting to send you the email and confirm its accuracy, or more likely, confirm that it is a scam.