After first validation request, sent a photocopy of a letter from OC just stating I owed a balance. Also enclosed a demand for payment. Then sent second validation request with no response. Sent Estoppel, and they just sent a handwritten note asking me to call them about my case. At this point, they then also pulled a hard inquiry. Account was then marked as paid. Sent ITS stating that a paid account is not satisfactory, in which they responded that they never marked it paid (must have been EQ based on my dispute and procedural request with them), and that "If CA receives any further correspondence in the same threatening vein as earlier letter, they will turn over correspondence to appropriate legal authorities" based on a Florida Statute 836.05 about threatening letters and extortion. I appreciate any and all help in doing this right!