those people are what we call "Skip Tracer" looking for a debtor who skip away. They are in a fishing expeditions calling left and right with threatening message.
If they do not have your name right. It would be impossible for their lawyer to build up a case against you.

I got a call from Excel Energy or something like that. Message said something about something being turned off in 24hours for some property in Colorado. I'm a debt-ridden University student who lives in Canada, and I certainly don't have any property anywhere in the US. The guy who left the message had my first name right though.

The caller ID said 651-639-4462 XCEL ENERGY and the call was a little after 8:30am. The said call back within 24 hours or my service would be disconnected and gave 1-800-895-4848 as their call back number. When I called back it had an XCEL greeting first few seconds but was odd their were no menu options and some lady got on the line and asked for my address after I told what I was calling about. Then said service hasn't been paid since the last year which I knew was true since I pay every month. What was weird was they had my condo number sightly wrong so I told her that I have nothing to do with that condo number. I thought odd that she asked for my address and not account number. She then said I will let the asser name Robet know (he was the one that left the message).  --very strange and some kind of scam. Now I see it was a debt collector from the previous post but all my bills are current so not sure why they called me!  It should be illegal for them to call and leave message like that!

Gace a fax of 612-318-4303, called from  651-628-1335, Left call back number of 1-800-895-4848

They work for Debt Collectors Tate & Kirkin.  Called using  # 866-923-5193 and left message to call the 800-895-4848 number.