Resurgent Capital uses many different layers to try to hide their true identity. Their sister company LVNV Funding is the company they use to buy worthless debt. Hence the name junk debt buyer. Junk Debt Buyers generally pay pennies on the dollar for old defaulted debt and try to collect the full amount plus interest and penalties.
If you are being sued by LVNV Funding there are plenty of ways to get them to leave you alone. If you just do some research you will find that there are plenty of defenses to lawsuits by junk debt buyers.
I found an interesting article about dealing with an LVNV Funding Lawsuit. It tells why a junk debt buyer may not be entitled to recover the amount that they claim your owe. You can read it at "If you are being sued by LVNV Funding just remember these words"