Oh god, this should be criminal. Once Dun & Bradstreet have your business information -- because you can't do any contracting without one! -- you start to get really really scummy calls trying to trip you up and get you to sign up for their business "services". They will call you and it will sound exactly like some government agency doing some routine government communication and verification of your information -- not asking you to volunteer any of it, because remember, they have all your information already because it's a legal requirement to have a DUNS number, which only they can issue -- and if you're distracted at all or just not on your game, suddenly you'll be signed up for all this expensive shit which is as sticky as any other scumbag subscription "service" out there. They are scummy dirtbags. What a nightmare!