Can’t speak for other responders but no reply necessary here. It’s all public information.
Unfortunately, it appears that you may have suffered a default judgment and, if so, there will be very little information available online. However, the Court Clerk won’t have more so start here:
http://www.lasuperiorcourt.org/civilcasesummarynet/ui/index.aspx? The form that you received will tell you the individual/entity awarded judgment, and that may suggest to you the nature of the claim against you. For a default, the case information is unlikely to tell you anything more than how you were allegedly served. That was probably by private process server, since the filing fee for a $9,800. claim would be $75.00 and the cost of certified mail or the Sheriff would not account for the $150.00 differential reflected in awarded costs.
Your time for appealing the judgment was 30 days from entry of judgment and expired on the date that you posted your question. But, if you feel that you were not properly served and, the above assumption is correct, you have 180 days from entry of judgment to appeal on that basis. Still, the sooner the better.
Understand that, to be successful in appealing based on inadequate service, you will have to travel 270 mi. from Wawona to appear for appeal and do it again, if you’re successful and then choose to contest the claim. If you allegedly were served in Wawona, the only issue you might have, aside from the merits is venue, if you reside/do business in Wawona (claiming you were not served, questions jurisdiction by definition).
If you question/challenge any aspect of the claim, the safest thing to do is to get a copy of the documents allegedly served. You can do this by getting scanned copies (set-up an online account at “Civil Case Documents”) at http://www.lasuperiorcourt.org/ or calling the Civil Clerk (not the Court Clerk) at the Van Nuys Court for costs and sending a check and SASE for copies of the Complaint and Proof of Service.
