If that were true, they need to prove it by mailing a validation of debt to the person they are calling. Phone calls, emails, faxes, and texts are not legal methods of debt notification. Besides, plenty of scammers call people who owe NO debt to try and steal from them. So your post is inaccurate.
Called today and my wife answered. They asked for me by name and said it was a "personal business matter". Wife handed me the phone and they hung up. I called back and the person that answered the phone said "Hi this is Kelly, can I help you". I explained they just called but hung up when I asked what I could do for them...
Called today, robo-voice says to please wait for a representative and it's important that they speak with me. I immediately found it fishy and hung up. Please state your business up front/identify yourself or forget about it!