Is defamation a cause of action

Yes, defamation is a cause of action.

Reclassifying this question from Litigation to Guardianship.

Can a pro per plaintiff separate himself from other pro per plantiffs to purse his lawsuit when all plaintiffs are on same case

Yes, you can ask the court to sever your case. The court has discretion to grant or deny that request.

Yes, unless the case is settled or otherwise resolved before trial.

I filed a peremptory challenge

Yes. Whenever you file anything in a court case, you have to serve the opposing parties with the filing.

What forms do I submit for a civil harassment lawsuit?

You should use form CH-100, which you can find at this website, along with instructions: http://www.courts.ca.gov/forms.htm?filter=CH

When filing a complaint do I caption it (complaint)?

Yes, Complaint, or Complaint for {identify the nature of the lawsuit/claims, or list the causes of action]

You plead the facts upon which the liability depends - "the facts constituting the cause of action." These are sometimes referred to as the...

Can I be served court paperwork by a non-U.S. Citizen?

Yes. Service may be made by any person who is at least 18 years of age and not a party to the action.

I'm a driver for Uber I was suspended for something I didn't do below is email they sent me I was wondering can they do this?

Reclassifying this question from Libel to Lawsuits & Disputes.