Section 426.10.

Cal. Code of Civil Procedure - CCP § 426.10.
in effect
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As used in this article: (a) “Complaint” means a complaint or cross-complaint. (b) “Plaintiff” means a person who files a complaint or cross-complaint. (c) “Related cause of action” means a cause of action which arises out of the same transaction, occurrence, or series of transactions or occurrences as the cause of action which the plaintiff alleges in his complaint.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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