Letter of Validation

See the letters section in this site

http://www.debtconsolidationcare.com/letters/

Here is a debt validation letter. You can tailor it as per your needs.

http://www.debtconsolidationcare.com/letters/sample6.html

Remember, you have the legal right to ask a debt collector to validate the debt. This is a federal law and the CA must honor your request. If they say that that it has been already been sent, verify the address used to send the letter. The facts will come out. If they say they are not required to send something in writing, it is a lie. Show them the FTC clause put at the link below

http://www.ftc.gov/os/statutes/fdcpa/fdcpact.htm#809

Thank you :)