After reviewing the thread again I would summarize the current conclusion about tldoctor:
1) The existence of a person named Eric S. Neal is confirmed.
2) The existence of Eric S. Neal as CEO and founder of two skiptracing and collection agencies is confirmed with official documents.
3) The only current conundrum is if tldoctor is in fact Eric S. Neal

I can answer the third point because I contacted tldoctor through this forum and I ended up becoming his investor.
I can attest that tldoctor is in fact Eric S. Neal because of his signature.

If you see the registration of his company in NH, you will be able to see his signed documents:
For example, this document from 2010 http://www.sos.nh.gov/imaging/12926555.pdf
Which matches with the signature that I received in my contract in 2013: http://i.imgur.com/i9BT1qC.jpg
This pretty much answers and confirms tldoctor's identity as Eric Neal.

He also has proven to me that he does seem to have access to all the tools necessary to be a debt collector.
Having said that, currently I can't testify about his actual proficiency as a skiptracer because the portfolio has just been acquired, but I have no reason to doubt about his skills beforehand.

-nano