Wouldn't hurt to post the website for the do not call number if you know it.  
I've been debt free and clean up for years, I checked my credit reports, I'm clear.  All of a sudden I get the same thing, they call in me almost  daily, they call me while I'm working. in meetings, in the morning evening, etc.
These idiots a NCO never stop calling.

Someone keeps calling and asking for Crystal Fisher. I don't know who that is. It's been once or twice a year the past 3 years. But now it's 3-4 times a week! at 5 or 6 a.m.! They won't believe me when I say I have no knowledge of someone with that name. I've had this phone number for 12 years. They are downright threatening. "You need to take responsibility for your actions!"

How do you report this

Called 3x today, but I don't answer 800 numbers. No other info on Caller ID. On another site they are listed as a grade "F" debt collection agency - NCO financial. Don't answer.

every f--k day, the same # I explain that thy have the wrong # but keep calling everyday

I don't know if it's a scam or not but I have almost 20 calls from them on my home phone in 3 weeks, so I called them and they said they were looking for someone who has never lived here. (We've had this number for 12 years)  If you are part of the Do Not Call Registry please go report them there.  They will get into trouble for harassing the wrong people.  Debt collectors are allowed to call you but they are supposed to know who the heck they are calling.  If we've had this number for 12 years there is no excuse.

It seriously only takes about 90 seconds to report them.  If everyone did that, they may get in trouble and stop doing this.

Lynn Edwards -- NCO Financial

After speaking with my ID protection company, I called NCO back. The collection agency was looking for someone else. I told her that I was not that person and didn't know anyone with that name. She immediately said she would flag my number for the do not call list. We'll see.

Here's the bizarre thing.  They had legit information from an unpaid speeding ticket out of state-knew my name, address, verified my last 4 of social.  they almost got my money by "threatening" comments.  fortunately, i thought it was strange i hadnt received anything in the mail and did NOT give him money.  Though, i did try to call back the next day and got voicemail for clayton or carlton williams.  This is scary because this scammer has somehow gotten REAL information.  REPORT it if it happens to you so we can catch this guy!

i got a call from this number, what is it? supposedly a debt collector.. yet i don't owe anything, as far as my credit report is concerned.. nothing listed.. where do they get my number? anyone else?

I received a message from this number too, stating from Infield Financial, a debt collecting company. I don't have any debt that I am aware of either. Strange.

I continue getting calls from this # 866-637-0271 on my cell and do not know why

I received a call from this number for the first time today.  The message they left said they're NCO Financial Systems and that they're a debt collector with the usual disclaimer about information collected will be used to collect a debt ... blah, blah, blah

NCO collections
866-637-0271