Foreign men claiming to be a paralegal and an attorney, stating I must be registered for a court case pending against me from 2008. Stated they had an affadavit in front of them. Very threatening and unable to answer simple questions when asked for clarifying details. Seems like a major scam but they pushed hard to convince me otherwise. Called back after I said I didn't feel comfortable giving out any personal information and hung up.

They obviously don't have a clue how the American court system works.  When a person testifies in writing and swears to that statement, that is an affidavit.  Court cases wouldn't be "pending" from 2008.  They push hard in order to scare you into paying them (extortion).

Read up on your rights here and also make a complaint at this government site: http://www.consumerfinance.gov/

Also file a complaint with your State Attorney General's office.
List of State AG’s offices:  http://800notes.com/faq/attorney-general

they told me same thing when you look up NCA it doesn't exist smh I told them to email company info he said F you in see you in cour . Monday at 11am

Just received a call from +1 (904) 404-8830
Jacksonville, FL they had the last 4 digits of my ss#. They could barely speak English and said that I had a lawsuit filed against me   Would not give me any other info even though I asked repeatedly. I also told them that I was recording the call and recorded the entire phone call. When I told them that if there was a lawsuits against me then they should have no problems getting in touch with me and serving me the proper paperwork they said "God bless you" and hung up

Got the same call. Very threatening and wouldn't/couldn't speak to any details regarding a lawsuit that was getting filed in the morning.  Kept saying to get a good lawyer.