I received a phone call today from a collection agency with respect to a debt that I had 15-20 years ago. They threatened to sue me and serve me with a civil judgement. They said that I had a judgement from years ago that they purchsed from another company. I have checked my credit report and public records office...no judgment on file. Since there no paper trail on this "so called" judgement, do I have any recourse to fight this old debt? Has the CA SOL run out? If I don't make payment arrangements with them, can they really take me to court?
Is there anything that I can do to be in the driver's seat with this scenario?

