National Service Center I received a call from the National Service Center to extend my auto warrantee. They refused to supply me with their physical business address.

When I first received the call, a person (whose accent was so thick I could hardly understand him) identified the make and model of my 2016 car and reported that my warrantee had expired.  Next, I was handed off to a second (sales) rep who tried to engage me with a sales pitch to extend the warrantee. I asked him to mail me the info, upon which he stated that the company had mailed me the info (at the correct address he reported, by the way).  He said he couldn't do that anyway because the computer program didn't have that capacity and I had "supposedly" received the mailings already.  Then I asked him to supply me with the physical address of the home office.  He said he didn't know it. 

When I insisted on the address of the home office, I was shunted of to his "manager" who was a high-power, aggressive, determined guy who evaded my home office address question.  He hung up on me.

Curious, I decided to look up National Service Center on the Internet -no website that I could find.  I called the call-back number of the company to ask for their website address.  One gal just hung up on me.  The second time I called, the second gal evaded my question by saying my car had to be "qualified."  I asked again for the web address.  More evasion.  Finally I said, "Your company has no website?  Verizon has a website, even my plumber down the street has a website. Your company doesn't havve a website??!. . . "  More evasion.  The gal became short with me and stated that we obviously couldn't do business and hung up.  I did thank her.  

In a nutshell, when National Service Center calls, be sure to ask for the home office address and/or the website.  See how far you get.  Scam? I don't know.  You decide.