Do I need a local form to file a civil complaint in Trinity County?

Yes. Trinity County requires Unlawful Detainer Supplemental Cover Sheet with a new civil complaint, in addition to the statewide Civil Case Cover Sheet and Summons.

What must be served with the summons in Trinity County?

The summons, complaint, and cover sheet, plus the ADR information required statewide by rule 3.221.

Filing a civil complaint in Trinity County, California: what the clerk requires

Where to file

Trinity County Courthouse11 Court Street, Weaverville, CA 96093All civil (single courthouse)

What Trinity County requires with the complaint

Beyond the statewide Civil Case Cover Sheet (CM-010), Summons (SUM-100), and your complaint.

Unlawful Detainer Supplemental Cover SheetUD only (not general civil). Listed on court Local Forms page ('forms required by the Trinity Superior Court'); applies to unlawful detainer complaints only. court's form

Checked against the court's local rules and forms pages on 2026-10-09.

What to serve with the summons

Beyond the summons, complaint, and cover sheet, Trinity County does not list additional documents to serve with the summons (California Rules of Court, rule 3.221, still applies to ADR information).

What filers get caught by here

Local Rules eff. 7/1/2021 (current per court site). Rule 3.02: general civil cases assigned to a judge at filing and EXEMPT from CMC; no CMC notice served.
Rule 3.04: collections cases (CRC 3.740) must be identified on the limited Civil Case Cover Sheet; court then prepares a Notice-Collections Case setting trial, which plaintiff serves.
No general-civil local intake form and no local ADR-package rule found.

What SimpleCase generates for a Trinity County filing

From one uploaded complaint, reviewed on one screen before anything downloads.

CM-010 Civil Case Cover Sheet
SUM-100 Summons
POS-010 Proof of Service (Personal)

See it on a Trinity County case

A sample case is waiting with this county's forms. No credit card, first three cases free.

Try it with a Trinity County sample

SimpleCase prepares document drafts for attorney review; it is not a law firm and does not provide legal advice, and no attorney-client relationship is created by using it. Court data on this page is sourced from the 1Court Directory with the verification date shown, and statutes and court rules change: always confirm current requirements, deadlines, and fees with the clerk of the court before filing.