Can you trust your Caller ID

Authorities are warning about caller ID spoofing, a process that allows someone to call you and have a phony incoming number show up in the hopes you'll recognize it and pick up.

Source:
http://articles.mcall.com/2010-09-22/news/mc-watchdog-caller-id-spoofing-20100922_1_caller-id-spoofing-credit-card-phone-number