Yes, I recieved the same call yesterday.  I contacted my lawyer this morning, and will be filing against this company. He called twice yesterday and twice already today and its only 10 am where I am. I haven't spoken with him, but he leaves voicemails sating the same thing. I even heard him on a commercial last night about harrassers. Now that I see that this is his career this makes me want to work even harder to get my case going. I have no debt for him to be calling about so this is harassment...

I got a call just a short time ago from this number, 281-377-5921 and  the phone ID just read, "Houston, TX". The caller did not give his name.
He said he was a courier for Nationwide Couriers. I immediately got the feeling that this was not right.
He asked me if I was going to be home tomorrow between 12 and 3. He told me he needed 2 forms of photo ID and a witness! I do not have TWO forms of photo ID.
When I asked him what this was about, he told me he was just a courier and did not know what it was. I said the package must have a return address and he just spoke over me saying that I had to have 2 forms of photo ID and a witness ready between 12 and 3 tomorrow.
In case I need to change the appointment, he gave me this phone number, 855-580-5797 and a reference number to use.
I do not like the idea of a stranger coming to my house and getting any kind of info on or from me with nothing more than a packet of faux papers. After reading a few of the responses on this site about possibly being served, I called our county offices to ask them how the sent papers to people for any reason and they told me if it was a legal matter they send a sheriff's deputy or officer of the court. Any other matter they send via registered mail.
What can we do to protect ourselves from things like this? Even law enforcement, it seems, cannot do anything about it.

I see that many of you have said the caller said they were coming to your house, but did any of them ever show up? That is what is concerning me at the moment. I know this is a scam, an attempt to illegally collect a "supposed" debt, but this guy said he was coming to my house! What will he do when he gets here? Give me proof that this is a debt?
I called the 855 number again and got a voice message (Your call is important to us, blah, blah) and the company that the voice named was Commerce Recovery and Capital Management.
After waiting for 15 minutes on the phone a person with an unusual accent came on. I gave her the reference number and she looked it up and gave me a staggering amount. I have never had that much debt in my life!! I asked her the name of the company that I had the debt with and she said I had it with them.
I explained to her that she worked for a debt recovery company and it was one of their clients that was trying to get their money back and I have the right to know the name of their client. All of this went right over her head and she said that I owe her company $XX,XXX . I went on to tell her she was breaking the law by not giving the debtor's information according to the FDCPA Section 806.
She hung up on me.
So, has anyone ever showed up at your doors after they said they were going to?

If the scammer shows up, call the police.  

NO ONE gets a heads up they'll be served.  And you also do not need two forms of ID or a witness.  These losers can't do anything to you - and no one will show up - they work by scaring people into paying bogus debt, debt that's already been paid off or even debt that may be owed - but not to them.

Suggest you report this to the Consumer Finance Protection Bureau.  Totally illegal tactics.