I have routinely added a weird little letter in the middle of my name, only give my actual birthday on things like a Drivers License and Passport or SS# info for an employer. Everything else has a different birthday, birthplace, middle name, even spelling of last name. That way I know with certainty who has sold my information. It's fun because I get random "Happy Birthday 42!" greetings all through the year. Even get some cool coupons to use. This has worked in my favor, as someone recently did a little bg check on me when we were dating. Thought I was much younger. kek