---
title: "PC 148.9 - False Identification to a Peace Officer: Penalties & Defenses"
description: "PC 148.9: what counts as false identification to a peace officer in California, real penalty exposure under PC 19, the 2021 probation cap, and real defenses."
url: "https://www.thehfirm.com/penal-codes/pc-148-9-false-identification-to-a-peace-officer"
site: "H Law Group"
---

# PC 148.9 - False Identification to a Peace Officer: Penalties & Defenses

PC 148.9: what counts as false identification to a peace officer in California, real penalty exposure under PC 19, the 2021 probation cap, and real defenses.

Topics: Criminal Defense, Penal Code, Obstruction, Misdemeanor

California Penal Code 148.9 doesn't punish lying to a stranger. It punishes lying to a peace officer who has lawfully detained or arrested you, specifically to dodge the court process or avoid being properly identified. Giving a fake name during a traffic stop, or giving someone else's name at booking, is exactly what this section targets.

It gets charged more often than people expect, usually stacked on top of whatever the officer stopped you for in the first place. What the DA actually has to prove, and what the real penalty exposure looks like, matters more here than in most misdemeanors, because the underlying stop is often where the real fight is.

## What the DA Has to Prove

[Penal Code § 148.9](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=148.9&lawCode=PEN) actually has two versions, depending on which kind of peace officer you're accused of lying to:

- Subsection (a) covers falsely representing yourself as another real person or a fictitious person to certain categories of peace officers (including municipal and county police), done to evade the court process or avoid proper identification.
- Subsection (b) covers the same false-identification conduct toward other categories of peace officers, but adds an element (a) doesn't spell out the same way: the prosecution has to show you knew, or reasonably should have known, you were speaking with a peace officer performing their duties.

Either way, the state has to prove the false statement happened during a lawful detention or arrest, and that you gave it specifically to dodge identification or court process, not just because you panicked or misspoke.

## Penalties: What You're Actually Facing

Section 148.9 doesn't list its own penalty amounts. That's not an oversight; it means the default misdemeanor punishment under Penal Code § 19 applies instead:

- Up to 6 months in county jail
- A fine of up to $1,000
- Or both, at the court's discretion

[Probation](/blog/different-types-of-probation) works the same way. Since 148.9 doesn't set its own probation length, the general misdemeanor cap applies: one year, under Assembly Bill 1950, which took effect January 1, 2021. If you're reading an older article, including some still circulating from before that date, that quotes a three-to-five-year probation term for this charge, that number is no longer accurate.

Because 148.9 involves a false statement, a conviction can also carry consequences beyond the sentence itself. It can be treated as a crime of dishonesty by licensing boards and can affect immigration status for non-citizens. Whether either of those applies to a specific case is a question for an attorney, not something a general overview can answer.

## Related Charges

- PC 529 (false impersonation): broader than 148.9. It covers assuming a real person's identity for that person's benefit or detriment in contexts well beyond talking to police, and can be charged as a felony depending on the circumstances.
- PC 148(a)(1) (resisting, obstructing, or delaying a peace officer): often charged alongside 148.9 when giving a false name is treated as part of a broader pattern of obstructing the officer's duties, not just the identification itself.
- VC 31 (false information to a peace officer): a similar misdemeanor under the Vehicle Code, carrying the same 6-month, $1,000 exposure, typically used when the false information relates to a vehicle stop, registration, or license rather than the person's identity outright.

## Common Defenses

- Mistake of fact. You didn't know, and had no reason to know, that the person you were speaking to was a peace officer performing their duties. This is most directly relevant under subsection (b), where that knowledge is an explicit element the state has to prove.
- No lawful detention or arrest. The statute only applies during a lawful detention or arrest. If the underlying stop was unlawful, a motion challenging that stop can take the false-ID charge down with it.
- No specific intent to evade identification or court process. Giving a nickname, a name the officer misheard, or a name you use legitimately in daily life isn't automatically a violation without evidence you meant to dodge being identified.
- Misidentification. During a chaotic stop involving multiple people, an officer can misattribute who actually said what. Body camera footage and dispatch records are often what settle this.

## Frequently Asked Questions

**Is lying about your name to a police officer always a crime in California?**

No. It has to happen during a lawful detention or arrest, and you have to be doing it to dodge court process or proper identification, not just out of nerves. A casual encounter that isn't a detention doesn't fit this statute.

**What's the difference between PC 148.9 and PC 148(a)(1) resisting arrest?**

148.9 is specifically about false identification. 148(a)(1) covers a broader range of conduct, obstructing, resisting, or delaying an officer's duties. The two are frequently charged together, since giving a fake name during a stop can be read as both.

**Can a PC 148.9 conviction affect immigration status?**

It's a crime involving dishonesty, and those can carry immigration consequences for non-citizens depending on the specifics of the case and prior record. That's a question to bring to an attorney before entering any plea, not something to guess at from a general overview.

**How long can probation last for a PC 148.9 conviction?**

Since 2021, misdemeanor probation in California is capped at one year for offenses that don't specify their own probation term, including PC 148.9, under Assembly Bill 1950's changes to [Penal Code § 19](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=19&lawCode=PEN). Older sources describing three to five years of probation for this charge are out of date.

**Does it matter if I gave a completely fake name instead of a real person's name?**

No. The statute treats representing yourself as a fictitious person the same way it treats representing yourself as another real person.

## If You've Been Charged

A false-ID charge is rarely the real problem. The stop or arrest underneath it usually decides how the case turns out. Whether the detention was lawful, whether the state can actually prove you knew who you were talking to, and whether probation or collateral consequences are in play all depend on the specific facts of your stop. Talk to a California criminal defense attorney before you say anything else to police or agree to a plea.

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