My little non-profit apparently got a DUNS number automatically when we filed our first 990EZ "online postcard" with the IRS. I had no idea that it existed unt

My little non-profit apparently got a DUNS number automatically when we filed our first 990EZ "online postcard" with the IRS. I had no idea that it existed until a merchant card processor wanted it along with our EIN because D&B had never called or mailed us anything. When I did the lookup on D&B's web site and found the number already assigned, I gave it to the people who wanted it and thought nothing more. Two days later, the phone calls and letters started. "Your Dun & Bradstreet registration is incomplete and may not be accepted!" They haven't shut up for over a year. Fortunately they don't appear to have a working telephone number for me.