Dig through data brokers

People-search sites resell a blend of public records, marketing data, and self-reported data. They are fast, cheap lead generators and terrible evidence. The one rule that matters: a broker record is a lead, never a fact. Confirm every field you intend to use against the primary source the broker got it from — and if you cannot identify that primary source, do not use the field.

What these services actually are

Three input streams, blended and sold: