Idaho Jail Holds on Unsigned Commission Warrants: The Legal Rules

In Idaho, a jail can hold you on a commission (bench) warrant even if the judge hasn't yet signed it—if specific conditions are met.

Statutory Basis (Idaho Code § 19-501 et seq.)

A warrant of arrest may be issued by a magistrate upon a showing of probable cause. The magistrate's signature is the formal authentication. However:

When an Unsigned Warrant Suffices for Detention

1. Issued by competent court: Magistrate/judge with jurisdiction.
2. Probable cause established: Affidavit or sworn testimony on record.
3. Presented by peace officer: Law enforcement delivers warrant (or certified copy) to jail.
4. System entry: Warrant entered into Idaho Law Enforcement Telecommunications System (ILETS) / NCIC.

If these exist, the jail must hold the person until:

• Judge signs the warrant (ministerial act), OR
• Court orders release (habeas corpus, dismissal, etc.).

Time Limits & Habeas Corpus

• "Reasonable time" for signature: Idaho courts interpret this as 48 hours (excluding weekends/holidays) for the judge to review and sign.
• If unsigned beyond that: detainee can petition for writ of habeas corpus (Idaho Code § 19-4201). Court may order release if signature unreasonably delayed.
• Exception: If probable cause is facially insufficient (bare bones affidavit), detention may be challenged immediately.

Practical Advice

1. Don't argue with booking deputies—they follow the warrant.
2. Contact a lawyer immediately to monitor the 48-hour clock and file habeas if needed.
3. Resolve the underlying case (appear, negotiate, post bond if available).

Unsigned ≠ invalid for holding purposes—if the magistrate already found probable cause. The signature is a formality; the judicial finding is the substance.