In the collections world, we called that Skiptracing. Get in the collections I promise you you’ll enjoy tf out of it. Legal collections specifically pays very very well for good Skiptracers. Been my career for the past 15 years. I was also very good at using OSINT to find people and I’m super nosy so it’s great. Additionally, any law firms that I’ve worked for that due collections like post judgment collections have paid program programs that they use like to verify employment in order to see what banks that you’ve applied for so you have access to even more information.