California procedure permits a party to make one peremptory challenge to an assigned judicial officer in an action. The challenge can disqualify the judicial officer without requiring the party to prove actual bias, but strict timing and procedural rules apply.

Specific Misconduct Does Not Have to Be Proven

A peremptory challenge is based on the party’s statement that they believe they cannot receive a fair and impartial hearing before the assigned judicial officer. It does not require detailed allegations or evidence of actual prejudice.

This differs from a challenge for cause, which depends on specific facts such as a disqualifying financial interest, relationship, or personal knowledge of disputed evidence.

Only One Peremptory Challenge Is Generally Available

A party ordinarily receives only one peremptory challenge in the case. Using it for an early temporary-orders hearing may affect the party’s options later in the proceeding.

The decision should therefore be made carefully. Disagreement with a prior ruling does not itself establish that a different judicial officer will produce a more favorable outcome.

Timing Rules Are Strict

A challenge must be made before the assigned judicial officer begins the relevant hearing, and additional timing rules depend on how and when the assignment was made.

Waiting to see how the judge rules before making the challenge is not permitted. Because assignments vary among courts, the party should promptly review the case notice, department assignment, and local calendar procedure.

Temporary Judges Present a Different Issue

A commissioner, referee, or attorney may sometimes serve as a temporary judge with the parties’ consent. A party may be able to decline to stipulate to that temporary judge rather than use their peremptory challenge.

Consent to a temporary judge may be written, oral, or inferred from conduct in appropriate circumstances. A party who has concerns should raise them before submitting the matter for decision.

A California family-law attorney can determine whether a challenge remains available, calculate the applicable timing, distinguish a peremptory challenge from a challenge for cause, and file the request before the opportunity is lost.