if they are a JDB and they purchased this Debt, Make then show you a Chain of Custody / Notice of Assignment that proves that have the right to collect on this Debt,
Also request proof the account numbers in Question are from the same account,
they claim the numbers they supplied me was the account number and a charge off account number, But they have even a third Number as well and in there Summons and discovery show 2 different open account Numbers its very confusing, But I will stand by my Answer to the Summons can not confirm or deny
They just told me in Discovery they are a debt buyer and they purchased my debt, So I just requested a Chain of Custody / Notice of Assignment during Discovery and I am waiting there reply, more then likely they do not have this