The Federal Trade Commission (FTC), the nation's consumer protection agency, is warning consumers to be on the alert for scam artists posing as debt collectors. It may be hard to tell the difference between a legitimate debt collector and a fake one. Sometimes a fake collector may even have some of your personal information, like a bank account number. A caller may be a fake debt collector if he:

?is seeking payment on a debt for a loan you do not recognize;
?refuses to give you a mailing address or phone number;
?asks you for personal financial or sensitive information; or
?exerts high pressure to try to scare you into paying, such as threatening to have you arrested or to report you to a law enforcement agency.

If you think that a caller may be a fake debt collector:

?Ask the caller for his name, company, street address, and telephone number. Tell the caller that you refuse to discuss any debt until you get a written "validation notice." The notice must include the amount of the debt, the name of the creditor you owe, and your rights under the federal Fair Debt Collection Practices Act.
If a caller refuses to give you all of this information, do not pay! Paying a fake debt collector will not always make them go away. They may make up another debt to try to get more money from you.?Stop speaking with the caller. If you have the caller's address, send a letter demanding that the caller stop contacting you, and keep a copy for your files. By law, real debt collectors must stop calling you if you ask them to in writing.
?Do not give the caller personal financial or other sensitive information. Never give out or confirm personal financial or other sensitive information like your bank account, credit card, or Social Security number unless you know whom you're dealing with. Scam artists, like fake debt collectors, can use your information to commit identity theft ? charging your existing credit cards, opening new credit card, checking, or savings accounts, writing fraudulent checks, or taking out loans in your name.
?Contact your creditor. If the debt is legitimate ? but you think the collector may not be ? contact your creditor about the calls. Share the information you have about the suspicious calls and find out who, if anyone, the creditor has authorized to collect the debt.
?Report the call. Contact the FTC and your state Attorney General's office with information about suspicious callers. Many states have their own debt collection laws in addition to the federal FDCPA. Your Attorney General's office can help you determine your rights under your state's law.

http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors

I received a call from an incestigator named Donna McCoy, when I called back there was no one by that name there, spoke to a lady named Stacey McNeely.  it was an office out of Georgia stating that they were calling on behalf of the county in which I do not live.  They couldn't find my number wanted my info, I threatened in telling them that I will contact the county to make them aware that someone is falsifying information, the lady got irate and hung up on me.  I believe that this is a scam

Caller said that she was as investigator in the summons division and that there were 3 cases pending.  Funny thing is that my spouse in in law enforcement in the county that they claim to be "investigating" from and there is NO such division and there are NO cases whatsoever pending.  He also found out that they are a scam debt collector that has gotten your information and is trying to scare you into thinking that you owe them money and are trying to get you to pay them $ to avoid prosecution.  DO NOT GIVE THESE PEOPLE ANY INFORMATION. NOTIFY THEM THAT YOU ARE AWARE IT IS A SCAM AND HANG UP ON THEM! They will use all types of information to try to get to you. They will even contact  your family members.