debt validation letter example

What is a sensor that sends the law if you send a letter of validation of the debt with them?

I sent validation letters debt of many companies to ask them to give me proof of the debt I have and sent me screenshots of what they see .. I asked in my letter to something more specific. Evidence for example, that the limitation period has not expire on account and verify that everything I've signed for the debt and the presentation of evidence that have accumulated ball, what should I do to these things from my credit. by the way, I'm not paying the money, I do not owe

They must have proof that you have debts, If it is a scam go to companies that buy old debts, then you probably have no proof. ~