I received an unsolicited single-page letter from this company, which is an obvious attempt to deceive me into believing that it is a bill for services rendered. The service that they are offering is ridiculous and can be easily accomplished for free on the internet. And, after a bit more research, I found that the internet address for Web Listings Inc. (www.web-listings.net) is very generic and there isn't any physical contact information. The mailing address is a P.O. box at a UPS store and there is no phone number and when I sent an message to the only email address listed, I did not receive a response. I also looked up the public ownership record for their website domain name (which is most likely how they found my contact information), but the it was registered to a different company that "protects the privacy of the domain registrant" located in Washington state. I called the number for that company
If you visit (http://www.jvfconsulting.com/blog/121/Website_Listing_Service_Fraud_Alert_Web_Listings_Inc.html) you can see a scanned copy of the "bill" and the comments at the bottom show that there have been many people who also had this sent to them.