>> He also missed a court hearing
I’m guessing U.S. registered mail was sent and signed?
While I don’t frequent the courts, I’m made aware of the hearings.
I'm guessing that his court system has the same system that California has, where you self certify under penalty of perjury that you mailed the documents. An example: http://www.courts.ca.gov/documents/pos030.pdf.
It would not surprise me if he sends out his admission of liability letters in promotional envelopes, such as reusing a business Amex envelope to entice people to toss the envelope without even looking inside at the documents. This, under many jurisdictions, would be legal service, but should the company bring that letter with them, odds are the judge won't be so amused.
We had that happen once for a small claims court case; were it not for the considerable amount of postage on the envelope, we would have tossed it in the trash.