You've heard the advice: When you receive an unexpected phone call from a company, hang up and call its verified phone number. But can you trust an internet search to find a valid number? Criminals have figured out how to deceive search engines including Google and put fake phone numbers in search results that look like the real thing. This malvertising, or malicious advertising, can lead to disaster for consumers like Marcia whose search for Amazon's customer service number goes very wrong.