Every lettings agency we walk into has at least one. A contact record that looks fine on the surface. A name. A note or two. Some activity logged against it. Nothing that immediately raises a flag. Until you look closer. No surname. No company. No verifiable contact details. A viewing request attached to a property that was sold three years ago. And a note, that was added in 2018 and was never updated that says she is "very particular about parking." Let's call her Margaret.