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UD-100Optional

Complaint—Unlawful Detainer

California · Judicial Council of California · Effective July 1, 2026

This form starts an eviction case, which is called an Unlawful Detainer action. It asks the court to rule on the issues the person filing the case wants to include in a final judgment against the person being sued.

The court describes it as: Starts an eviction case and tells the tenant all the issues the landlord wants to include in a judgment against them.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Start a case

Stage: Start a case

This form is used by a landlord (plaintiff) to start a lawsuit against a tenant (defendant) when the landlord believes the tenant has violated the terms of a rental agreement or has overstayed their right to live on the property.

Usually filed by the person starting the case.

Official instructions

How-to guides published by the court for this form.

Common questions

What is this form for?
This form is used to start an Unlawful Detainer case, which is a type of lawsuit for eviction.
Who fills out this form?
The plaintiff, who is usually the landlord, fills out this form.
Does this form require a fee?
The text does not mention any filing fees for this form.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect July 1, 2026.

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