If you can prove identity theft and that the debt wasn't yours, perhaps you can file a motion to vacate the judgment. It will depend on the civil procedure rules in your jurisdiction, and it may be too late; but it certainly seems worthwhile to consult a consumer law firm in your area that deals with collection defense.
The answers to these questions may be different depending on your individual circumstance and should not be considered as legal advice or the establishment of an attorney-client relationship.
Judgments bear interest at the rate of 10% per annum and may also include costs of collection if a memorandum of costs is filed. In nearly all cases if you do not promptly satisfy the judgment voluntarily the amount you will have to pay later is more.
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Hire a consumer protection attorney licensed in California. I handle this type of work outside of CA and would be happy to give you a free qualified referral to someone that will handle these on a contingency fee.
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