I normally don't answer unknown numbers, but this company called my work - They were really friendly and I just had to answer a few questions before they emailed me a free whitepaper on CRM's. It was actually helpful since I'm looking into new ones right now. They also assured me I would not get any spam and so far this has proven true!
If you're not a shill, then you won't mind telling us the name of this "unknown" company, what they're trying to sell and their mailing address. However, I still think you're a shill because you really wouldn't have come here to post a glowing review and failed to state at least the identity of the company.
Yes, they offer a money back guarantee that they won't sell your name, number, email address and job function to others! Unfortunately, since you didn't pay anything to get that 'free' whitepaper, that guarantee is worthless.