I sent out a debt validation letter to Pinnacle Financial Group early this month by certified mail and haven't recieved the little paper saying that they recieved it. I am almost certain they won't be able to validate the debt, which means I will be able to get it removed from my credit report. Now that I've sent the letter, they're calling me...despite the fact that I asked them to cease contact in the letter. Without proof that they recieved it, how do I get rid of these jerks?