866-884-0481

callers claiming to be with the "county dispatch" ask you to call that number.
the imposters imply that there will be legal action taken if you don not call

This person called and advised that they have been trying to serve me a summons for legal actions on a account that was closed in 2008 and charged off in 2012. they had all my information and advised that they are seeking a lein on my home. how could it be that they will be seeking legal action after 11yrs.

They aren't and it would be illegal to sue you or threaten to sue you in 49 states.  As long as you don't live in Kentucky you are fine.  No one suddenly files a lawsuit without try to get money out of someone first using legitimate phone calls and/or letters.

The fake process server/location finder extortion SCAM usually consists of the following:

They mention that they have received a Fax document or some sort of complaint and that there is a pending legal matter or action about to filed against you to create the sense of urgency. They tell you that they are a “process server” and cannot give you the particulars of the case since the file is sealed. This is simply ruse to get you to call another number (often with a made-up case number) where they will ask for money to “make it go away” (this is actually the same place, they work in teams, one pretending to be the server, and the other usually pretends to be a lawyer). They threaten to serve you at home or at work. They tell you that if they serve you at work then they will need a supervisor, security, or HR person there as a witness, hoping that will cause you to panic over the alleged embarrassment of being served at work. They also tell you that you will need two forms of ID. None of which is true. Process servers do not ever call ahead so that you can dodge them. Process servers get paid to serve papers, nothing else. They certainly are not going to pass up a paycheck by telling you that you can avoid being served, they are not going to give you an extra day or even a few hours to get a “stop order”. Court documents are time sensitive and must be served within a certain amount of time. Remember that you can always call the local courthouse to see if there really is a lawsuit that has been filed against you.

It is incumbent upon them under the law to prove that the debt exists and that you owe it, and (this is the important part) that they have the legal right to collect it. You are not obligated under the law to prove that you don’t owe or that it is paid.

Federal law (FDCPA) requires them to send you a letter, email, or text (postmarked in the case of a letter) within 5 days of their first contact that contains their name, physical address, the creditor’s name, and the amount of the alleged debt. Unless they have communicated it to you verbally at the beginning of your conversation. It also must contain the “mini-Miranda” telling you that it is an attempt to collect a debt and that all information will be used for those purposes. The one other important thing that this communication must also have in it is that you have a right to dispute the debt within 30 days of receipt of the letter and if you do so, all collection activity must be stopped until the debt is verified. If and when you get that communication you should immediately send that debt validation letter by certified, return receipt mail.

First, you should make a complaint at this Federal Agency, and while there you should also read up on how debt collection is supposed to work as well as what your rights in this matter are: https://www.consumerfinance.gov/

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

Number came in as "restricted" so I answered thinking it might be from my medical team (I was expecting a call from them). I was informed that I have a judgement against me, given a case number, that I need to call 866-884-0481 within the hour, and that I have been "properly served" since the phone call was recorded.

Granted, I am not a lawyer; however, I am someone with common sense. First, I know that there is no reason why I would have any judgements against me; second, I know that now-a-days a 866 prefix is most likely a scam call back number; and thirdly (and most important), there is no way in God's creation that I can be "properly served" over a phone.

What concerns me the most at this point is that scammers have elevated their skills from "ghost" phone numbers which can be blocked (i.e. caller ID comes up 927-895-5684) to a "restricted" caller ID that I would rather not block due to calls that I am expecting. Unfortunately, I doubt that mobile phone carriers would be able to implement tech to weed out these calls and the FCC and state AG's don't have the resources or tools to put a stop to this.

I short folks - PLEASE use your common sense and use the internet to research any information these scammers give you. If something doesn't seem right or something seems to be too good to be true then it's not legit.

The FCC does not have jurisdiction over debt collectors. I don't know why everybody thinks they do. If you have a judgment against you then there's no reason to serve you. Everything else you need to know has already been posted.