A caller showed up on my caller ID several times - never left a message but when I answered caller (female) was asking about a person known to me ---  i got the impression she was a friend of this person trying to find where she had moved.  Never revealed it was a debt collector. Told the caller I did not think the person she was asking about wanted to be found   ... she declined to leave a call back number.

In stead of a friend calling I strongly believe it was a debt collector and I'm mad they did not identify themself as trying to collect a debt.