This is a version of the you-have-committed-a-crime extortion scam and you are being...
1. summoned/investigated/charged/whatever with fraud/embezzlement/passing_bad_checks/whatever or
2. served with a court_summons/arrest_warrant/bench_warrant/whatever or
3. located in preparation to_being_served/for_a_lawsuit/to_be_arrested/whatever or
4. sued for cable TV usage that you've been stealing for years or
5. whatever stupid crap reasons they will think up next.

And you have to...
1. call back with your case number or
2. confirm your address/birthdate/SSN/whatever so you can be served or your papers processed or
3. pay $895 now to avoid paying $5,000 in court or
4. whatever stupid crap reasons they will think up next.

Beware extortion scams come in many flavors and they constantly evolve to stay one step ahead of the law.
The FBI warns about payday loan extortion scams here http://www.fbi.gov/news/pressrel/press-releases/paydayloanscam_120710
The BBB has issued several alerts on this scam, just google "bbb.org alert phony debt collector"
Never do what they tell you to do but report them to the Internet Crime Complaint Center http://www.ic3.gov/complaint/default.aspx , the Federal Communications Commission http://esupport.fcc.gov/complaints.htm , the Federal Trade Commission https://www.ftccomplaintassistant.gov/ and your state AG, as appropriate.

i got a call said i was jail bait for loand or bounced checks. its a huge scam pay nothing!!

A lady named Debra Barge called my father's number and said I was a "person of interest in an impending investigation," and that she was from the "fraud and worthless checks division.  That I needed to call her or have my attorney call her.  Then she said "good luck."  When I tried to call the number back it rang like 15 times and went to a vm for a Adam F. in district 217.  WTF???