California Guard Card — Complete Study Guide (2026)

This is the free sample chapter of the PrepPass California Guard Card Study Guide (2026 Edition). It is an independent educational study guide — not affiliated with, endorsed by, or produced by the California Bureau of Security and Investigative Services (BSIS) or any government agency, and not a BSIS-approved training course. It contains no copied exam content; verify every statute and figure at leginfo.legislature.ca.gov and bsis.ca.gov before you rely on it. The full guide adds Chapters 2–7 (Use of Force, Liability, Documentation, Communication & Ethics, Emergency Procedures, and Terrorism/WMD), 50 practice questions with a full answer key, and a quick statute reference — free companion practice and a timed mock at PrepPass.org.

Chapter 1 — Powers to Arrest

Introduction

Everything a security guard is allowed to do — and everything that gets a security guard sued — starts with one question: what authority do I actually have? You are not a police officer. You do not carry a badge that lets you stop, search, and arrest on suspicion. You are a private person with a job, and your legal power to detain and arrest is defined by a handful of California Penal Code sections that every guard must know cold. This is the largest subject area on the exam, one question in four, because it is the legal floor everything else stands on.

These rules are precise, which is what makes them learnable. California law draws three bright lines: the difference between an encounter, a detention, and an arrest; the difference between what a peace officer may do under Penal Code §836 and what a private person (you) may do under §837; and the difference between a misdemeanor and a felony for arrest purposes. Master those three lines and you will make good decisions on shift and score full marks on this section.

This chapter walks through what an arrest legally is (§835), your citizen's-arrest authority and its dangerous "in fact committed" limit (§837), the misdemeanor "in your presence" rule, the duties that kick in the moment you arrest someone (notice under §841 and prompt delivery under §847), the shopkeeper's privilege that most retail guards actually use (§490.5(f)), and the BSIS framework that licenses you in the first place.

Learning objectives

After working through this chapter you should be able to:

• State what legally constitutes an arrest under Penal Code §835 (custody by physical restraint or by submission), and distinguish an arrest from a consensual encounter and a detention.
• Explain the difference between peace-officer arrest authority (§836) and private-person / citizen's arrest authority (§837), and why the phrase "a felony has in fact been committed" is the single most dangerous limit on a guard's power.
• Apply the misdemeanor "in your presence" rule of §837(1) — you may arrest for a misdemeanor only when you personally perceived it.
• List the two post-arrest duties: notice of intent, cause, and authority (§841), and delivery to a peace officer without unnecessary delay (§847).
• Use the shopkeeper's / merchant's privilege (§490.5(f)) to detain a suspected shoplifter reasonably in time, manner, and force — and recognize when exceeding it destroys the privilege.
• Describe the BSIS licensing framework under the Private Security Services Act and the training you must complete to earn and keep a Guard Card.

Part A — What an arrest actually is, and what it is not (§835)

California Penal Code §835 defines an arrest in one clean sentence: an arrest is made by an actual restraint of the person, or by the submission of the person to custody. The key word is custody — the person is no longer free to walk away. Everything short of that is not an arrest — and the arrest line is the one with the most legal consequences attached, so you need to know exactly where it sits.

California law recognizes three levels of contact, and you should be able to name them in your sleep:

• Consensual encounter. You walk up, say hello, and ask a question. The person is free to ignore you and leave at any moment. No justification is required because nothing is being taken from the person — no seizure has occurred. "Excuse me, did you see what happened over there?" is a consensual encounter.
• Detention. A brief, investigative hold based on reasonable suspicion that something criminal is happening. You may stop the person to investigate — ask questions, confirm identity, look at a receipt — but you may not yet take them into custody. A detention must be temporary and no longer than needed to confirm or dispel your suspicion.
• Arrest. Full custody. It requires reasonable cause (also called probable cause) — a state of facts that would lead a person of ordinary care and prudence to honestly and strongly suspect the person is guilty of a crime. This is far more than a hunch, and far less than proof beyond a reasonable doubt.

As a security guard you spend most of your shift in the first two zones. The reason to know the arrest line exactly is that your words do not control — your actions do. If you grab someone's arm and tell them they cannot leave, you have arrested them under §835, even if you never said the word "arrest." Under §835 the person you arrest may be subjected only to such restraint as is reasonable for the arrest and detention — not punishment, not a beating, not handcuffs "to teach a lesson." The moment your restraint exceeds what is reasonable, you have left the protection of §835 and entered the territory of battery and false imprisonment, which Chapter 3 covers in detail.

Why the levels matter for you. The justification you need rises with the level of intrusion. A consensual encounter needs nothing. A detention needs reasonable suspicion. An arrest needs reasonable cause and — for a private person — it must fit inside §837, which we turn to next. Guessing wrong in the upward direction (arresting when you only had suspicion) is how guards get sued.

Part B — Peace officer authority (§836) vs. private-person authority (§837)

One structural fact drives this whole chapter: security guards are not peace officers, and private-person arrest authority is narrower and riskier than the authority a police officer has.

A peace officer, under Penal Code §836, may arrest:

• for a public offense committed in the officer's presence;
• when the officer has probable cause to believe the person committed a felony, whether or not the felony happened in the officer's presence.

Crucially, an officer who arrests on reasonable probable cause is broadly protected even if it later turns out no felony actually occurred. Reasonable belief is enough for the cop.

A private person — and that includes every security guard — operates under Penal Code §837, which is narrower. A private person may arrest only:

1. for a public offense committed or attempted in your presence (§837(1));
2. when the person arrested has committed a felony, although not in your presence (§837(2));
3. when a felony has in fact been committed, and you have reasonable cause to believe the person you are arresting committed it (§837(3)).

Look hard at the words "has committed" and "in fact been committed." For a private person, the felony must actually have happened. If it turns out no felony occurred, your arrest was unlawful — even if you acted in complete good faith on strong evidence. This is the single most consequential difference between you and a police officer, and the exam tests it relentlessly.

The Cervantez trap. In Cervantez v. J.C. Penney Co. (1979) 24 Cal.3d 579, the California Supreme Court made the point unmistakable: a private person who arrests for a felony that did not in fact occur is exposed to false-imprisonment liability, no matter how reasonable the belief was at the time. Mistaken-but-reasonable belief protects the officer under §836; it does not protect you under §837(2)–(3). When you are not certain a felony truly happened, the safer path is to detain briefly and summon police, who can act on the broader §836 standard.

Observe and report — the industry default. Nothing in §837 obligates you to arrest anyone, and most California post orders say so plainly: the job is to observe and report — watch, document, radio it in, and be the best witness the police ever had — not to chase, search, or apprehend. Detention and arrest are tools for the narrow assignments that actually call for them (a retail loss-prevention post, for example), and everything in this chapter is a limit on those tools, not an invitation to reach for them. The exam probes this from both directions: the guard who thinks he must intervene, and the guard who thinks he may never act. Both are wrong. You hold a narrow legal power, you use it only when your post orders and the law line up — and reporting is always the option that cannot be held against you.

Part C — The misdemeanor "in your presence" rule (§837(1))

For misdemeanors, a private person's arrest authority is limited to offenses committed or attempted in your presence. "In your presence" means you personally perceived the offense with your own senses — you saw it, heard it, or otherwise directly witnessed it. It does not mean:

• a radio call from another guard,
• a report from a customer or employee, or
• video you reviewed after the fact.

If a shopper runs up and says "that man just slapped someone," and you did not see it, you have no private-person misdemeanor-arrest authority — the misdemeanor was not in your presence. You may briefly detain to investigate (and in a retail setting the shopkeeper's privilege, Part E, may apply), but you cannot make a citizen's arrest for a misdemeanor on someone else's word alone.

This is the rule that limits everyday security work the most, and it is a favorite of exam writers because it separates guards who memorized "citizen's arrest" from guards who understand it. The practical fix is almost always the same: when the misdemeanor was not in your presence, detain if you have a lawful basis and call the police. Officers under §836 can act on their own investigation and are not bound by the private-person limits.

Note the asymmetry that trips people up: for a felony, §837(2)–(3) lets a private person arrest even when it was not in your presence — provided the felony in fact occurred. For a misdemeanor, §837(1) requires it to be in your presence. Felony = must be real (even if unseen); misdemeanor = must be seen (even if minor). Keep those two lanes separate.

Part D — After the arrest: notice (§841) and prompt delivery (§847)

The moment you make a citizen's arrest, two duties attach immediately.

Notice — Penal Code §841. The person making an arrest must inform the person being arrested of (a) the intent to arrest, (b) the cause of the arrest, and (c) the authority to make it. In plain speech, something like "I'm a security officer making a citizen's arrest for petty theft" satisfies §841. You may skip the formal notice only in narrow situations the statute recognizes — for example, when the person is actually engaged in committing the offense or is in flight immediately after, or when giving notice would be impractical because the person is using force. Convenience is never a reason to skip it.

Delivery — Penal Code §847. A private person who has arrested another must, without unnecessary delay, take the person before a magistrate or deliver the person to a peace officer. This is a hard limit. You do not get to:

• interrogate the person,
• march them to a back room for an hour,
• hold them until they confess or sign anything, or
• decide to release them with a warning once you have formally arrested them.

Call the police and hand the person over promptly. Delay beyond what is reasonably necessary can convert a lawful arrest into false imprisonment. And note the immunity gap: §847 gives peace officers limited civil immunity for arrests later found to lack probable cause; private persons do not get that protection. That immunity gap is one more reason to be cautious about crossing from detention into a formal arrest.