Hey, I'm from Texas and received a letter from a collection agency on a credit card
From discover, sent a debt validation letter to the agency and received a letter from
Discover wanting dl# or an official document containing my signature and a detailed
Letter including any documentation to substantiate my dispute, why did this letter come
From discover if they have placed it with a collection agency and shouldn't they have
A copy of my signature? Does anyone know what this means any help would be appreciated.

Because they have to reply within a certain time frame and they are trying to cover the issue of most likely ot having any proof.

Again respond by denying any debt and demand they provide proof of it.