You probably know not to hand a stranger your Social Security number, but scammers do not always need your most sensitive information to cause trouble. A phone number, email address, or date of birth can become surprisingly useful when combined with information from data breaches, social media profiles, and people-search sites.
The Identity Theft Resource Center reported 1,803 U.S. data compromises in the first half of 2026, resulting in an estimated 471.2 million victim notices. That helps explain why identity theft scams increasingly rely on combining seemingly ordinary details rather than stealing one perfect piece of information. Here are three pieces of personal information worth guarding more carefully and what scammers can actually do with them.
