Offer your thoughts or opinion on the input financial query or topic using your financial background.

Debt collector has wrong person and is contacting my employer
You are talking to the wrong people.  Debt collectors are not intimidated by anything you say. Call and tell them that, before you pay the debt, they need to get the paperwork from the company to verify that you actually owe them the money and the amount.  You need copies of the original paperwork. This alone may resolve the issue.  If not, then call the client company and explain that THEIR debt collection agency is talking to the wrong person.  Explain why you are not that person. It may be necessary to tell them that your lawyer advised you that they will be personally held responsible for any damages that you may incur from this debt collector's actions.  The client is the one who needs to be intimidated.