Your security team sends a warning about a phishing campaign, and within a day it is buried under forty other messages. Physical security teams solved this problem long ago with the BOLO, short for “be on the lookout,” and this explanation of what a BOLO means in security operations shows how a few structured lines can put an entire team on alert in minutes. Cybersecurity teams rarely write alerts with that discipline. The result is warnings that are accurate, well meant, and almost never acted on.
Key Takeaways
- An alert that does not name a specific target, a specific signal, and a specific action is a bulletin, not a warning.
- The BOLO format forces brevity, which is the main reason it gets read.
- Alert fatigue is a writing problem as much as a tooling problem.
- Every alert should have an owner, an expiry date, and a closing update.
Why It Matters
Most internal security alerts fail because they are written to inform, not to trigger action. A message that says “be careful with emails this week” gives no one a task. Readers skim it, agree with it, and forget it before the next meeting.
The cost is real. Analysts, help desk staff, and front-line employees are the people most likely to see the first sign of an attack, and they only act when an alert tells them what to look for. When alerts are vague, the first signal gets dismissed as noise, and the gap between first sighting and escalation widens.
Guard and patrol teams cannot afford that gap. A guard on a night shift has seconds to recognize a described vehicle or person, so BOLOs are built to be read at a glance and used immediately. That constraint is exactly what internal security communication is missing.
What a BOLO Gets Right That Most Cyber Alerts Get Wrong
A good BOLO answers four questions in under 60 words: who or what, what does it look like, what should I do, and who do I tell. Everything else is cut. That compression is a feature, because every extra sentence lowers the odds that the message is read to the end.
Compare that with a typical internal advisory. It opens with background on the threat actor, explains the technique in three paragraphs, and buries the single instruction in the last line. The people who most need the instruction never reach it.
The four parts of an actionable alert
- Subject. Name the exact thing to watch for: a sender domain, a file name, a login pattern, a ticket type.
- Descriptor. Give the observable signs: the subject line wording, the odd time of day, the mismatched reply-to address.
- Action. State one step: do not open it, report it with this button, lock the account, call this extension.
- Contact and expiry. Say who owns the alert and when it stops applying.
The fourth part is the one most teams skip, and it matters most for trust. Alerts with no end date pile up until nobody can tell which ones are still live.
Specificity beats severity
Teams often try to get attention by labeling alerts “critical” or “urgent.” Readers learn quickly to discount those labels when the content underneath is generic. A calm, precise message about one invoice-themed phishing email from one domain will outperform a loud, vague warning every time.
Pro Tip: Read your alert aloud in 20 seconds. If you cannot finish it, or the listener cannot repeat back what to do, it fails the BOLO test.
Building a BOLO-Style Alert Process
The simplest way to adopt this format is to standardize it as a template that anyone on the security team can fill in within two minutes. Speed matters because an alert written an hour late describes a threat that has already moved.
Template fields that keep alerts tight
- Alert title: one line, naming the threat in plain words.
- Seen where: email, VPN logs, a specific application, a physical entry point.
- Looks like: two or three concrete indicators.
- Do this: one action, in the imperative.
- Report to: a named person or channel.
- Valid until: a date and time.
This mirrors how operational teams in guarding work. Dispatch and control room staff keep alert formats consistent so a supervisor who has never seen a particular message can still parse it instantly. Consistency is what turns a message into a habit.
Route alerts by role, not by blanket email
A BOLO about a stolen delivery uniform goes to the gate team, not to every guard across every site. Cyber alerts should work the same way. A credential-stuffing warning is relevant to the identity team and customer support, while a malicious invoice campaign is relevant to finance. Targeted delivery cuts noise and makes each message feel worth reading.
Close the loop every time
Every BOLO should end with a status: located, resolved, or cancelled. Internal security alerts deserve the same closure. A short follow-up such as “the campaign has stopped, 14 reports received, no accounts affected” tells staff their reports mattered. That feedback is what keeps reporting rates high over time.
Comparing Weak and Strong Alerts
The difference is easiest to see side by side. The table below shows the same threat communicated two ways.
| Element | Weak alert | BOLO-style alert |
| Title | Security awareness reminder | Fake invoice emails from “billing-portal” lookalike domain |
| Indicators | Be wary of suspicious emails | Subject contains “Overdue Invoice,” attachment is a .html file |
| Action | Use caution | Do not open; click Report Phishing |
| Owner | Security team | Named analyst and channel |
| Expiry | None | Valid until Friday 5 p.m. |
| Read time | 2 to 3 minutes | Under 30 seconds |
The strong version carries less information in total but far more usable information. Readers can act on it without opening a second document.
A Concrete Example: The Same Week, Two Outcomes
Consider a mid-sized logistics company that receives a wave of credential-harvesting emails aimed at its dispatch coordinators. The security lead sends a 400-word advisory covering the attacker’s methods, industry trends, and general best practices. The one instruction, to report anything that mimics the shipping portal login, sits in the final sentence.
By Wednesday, three coordinators have entered credentials on a fake page. None of them read past the second paragraph, and none connected the advisory to what landed in their inbox.
Now rewrite it. The alert reads: “Fake shipping portal login emails. Sender uses a lookalike domain with a swapped letter. Subject: ‘Action required: verify your dispatch account.’ Do not click. Forward to the phishing mailbox. Owner: security desk, extension 214. Valid through Friday.” It reaches only the dispatch team, takes 20 seconds to read, and gives every coordinator a clear trigger.
In this version, the first coordinator who sees the email reports it within minutes. The security team blocks the domain, sends a closing update, and reports include a count of how many people flagged it. Same threat, same people, very different result.
Key Insight: Alerts do not fail because people ignore security. They fail because people were never given a task small enough to complete.
Common Mistakes That Undermine Alert Quality
The most common mistake is stacking several threats into a single message. Readers cannot hold three different instructions, so they act on none. Send one alert per threat, even if that means more messages.
Writing for the auditor instead of the reader
Some alerts are written to prove that someone warned the organization. They are thorough, hedged, and unreadable. Keep the full technical write-up in a linked record for the security team, and keep the alert itself lean.
Leaving alerts open indefinitely
When old alerts never expire, readers stop distinguishing live warnings from historical ones. An expiry time takes five seconds to add and preserves the credibility of every alert that follows.
Treating physical and digital signals as separate
A tailgating incident at a loading dock and a suspicious badge-reader login may be the same event. Teams that keep physical and cyber alerts in different channels lose the chance to connect them. A shared format makes cross-referencing easier even when the systems themselves are separate.
Actionable Takeaways
- Audit your last five internal security alerts and mark each one against the four BOLO parts: subject, descriptor, action, contact and expiry.
- Create a single alert template with fixed fields and a 60-word target length.
- Assign every alert an owner and an expiry time before it is sent.
- Segment distribution lists by role so each alert reaches only the people who can act on it.
- Send a closing update after every alert, including how many reports came in.
- Review alert response rates monthly and rewrite the templates that underperform.
Conclusion
The BOLO survives in physical security because it respects the reader’s time and attention. Internal cybersecurity alerts can borrow the same discipline without any new tools: name the target, describe the signs, give one action, and set an end date. Teams that write this way tend to see faster reporting and fewer repeat mistakes, because people finally know exactly what they are looking for.
FAQ
What does BOLO stand for in security?
BOLO stands for “be on the lookout.” It is a short alert that describes a person, vehicle, or situation so that staff can recognize it quickly and respond.
Security teams use BOLOs because they compress the essential details into a format that can be read and understood in seconds.
Can the BOLO format work for cybersecurity alerts?
Yes, the format translates directly to cyber threats. Replace the person or vehicle with a sender domain, file type, or login pattern, and keep the same structure of subject, descriptor, action, and contact.
The main benefit is brevity, which raises the chance that employees read the alert and act on it.
How long should an internal security alert be?
An effective internal security alert should be 60 words or fewer. That length can be read in under 30 seconds and still hold the indicators, the action, and the owner.
Longer technical detail belongs in a linked record for analysts rather than in the alert itself.
Why do employees ignore security alerts?
Employees ignore security alerts mainly because the alerts are vague, frequent, and rarely tell them what to do. When every message carries the same urgent tone, readers stop treating any of them as urgent.
Specific indicators, a single action, and targeted distribution reduce this fatigue.
How often should security alerts expire?
Every alert should carry an expiry time, usually between a few hours and a few days depending on the threat. Short windows keep the alert feed current and trustworthy.
If a threat remains active past the expiry, issue a fresh alert with updated indicators rather than extending the old one.
