Like so many others, I received a mail in the listing from the yellow pages online services to verify my business citation listing. The letter states in big capital letters that it is not a bill. Come a few weeks later I receive a bill from them for $329!
This company is a scam, they deceive you into thinking they are the normal yellow pages, and trick you into thinking you're doing something for free, only to charge you for it. Then they start harrassing you with calls, emails, and threats to collect their debt.
Don't give these scumbags any money, and throw out their sheet if you get it in the mail.