Assuming that the document is fake, you can sue them under the FDCPA and California's Rosenthal FDCPA. Both these statutes prohibit the use of false representations during the collection of a debt. Since you are in California, you are allowed to sue the agency under both statutes in a combined action for $2,000 in statutory damages as well as any reasonable attorney fees and costs incurred in bringing your claim.
Answered on Nov 28th, 2011 at 2:14 PM