The Art of Skip Tracing: How Private Investigators Track Down the Hard-to-Find. In the world of private investigations, few skills are as crucial as skip tracing. Whether it’s a missing person, a debtor avoiding repayment, or a witness crucial to a legal case, locating individuals who don’t want to be found is a specialized art. At Self Assurance Investigations, we use advanced techniques and cutting-edge databases to track down even the most elusive targets.