How to Prevent Smishing: A Playbook for Organizations

Smishing prevention is not one control; it is a layered program. Smishing, the SMS variant of phishing, targets the one communication channel almost every employee and community member checks within minutes, and it bypasses most of the email security stack organizations have spent years building. Preventing it requires a combination of technical controls, human training, clear policies, and, for organizations that send text messages themselves, sender-side practices that make your real messages easy to distinguish from fakes.

Put simply, preventing smishing means reducing the chance a malicious text reaches your people, reducing the chance they act on it, and reducing the damage when someone does. This playbook covers all three layers, drawing on guidance from the Cybersecurity and Infrastructure Security Agency (CISA), the FTC, and the FBI's Internet Crime Complaint Center (IC3). If you need the foundational definitions first, see our glossary entry on what smishing is and how SMS phishing works.

Layer 1: Reduce Exposure

You cannot train away a threat your people never see. Start by shrinking the attack surface.

Filter and report at the carrier level

• Encourage everyone in the organization to forward scam texts to 7726 (SPAM). This is the wireless industry's shared reporting short code, and every report improves carrier-level filtering for all subscribers.
• Enable the built-in spam filtering on managed devices. Both major mobile operating systems offer unknown-sender filtering that separates messages from numbers not in the user's contacts.
• On corporate-managed devices, use mobile device management (MDM) to enforce OS updates and, where available, deploy mobile threat defense tools that flag known malicious links.

Publish and protect your own numbers

• Maintain a public, authoritative list of the phone numbers your organization texts from, on a page you control. When an employee or community member receives a text claiming to be you, they should be able to verify the number in seconds.
• Register your organizational texting properly. In the US, business SMS traffic over standard long codes goes through 10DLC registration, which ties your numbers to a verified brand identity that carriers can vet.
• Monitor for impersonation. Search periodically for lookalike domains and report brand impersonation to the affected platforms and to the FTC.

Layer 2: Reduce the Chance People Act

Most smishing succeeds through psychology, not technology. CISA's general phishing guidance stresses the same recognition skills across channels: unexpected contact, urgency, and requests for credentials or payment are the triad to train against.

Set bright-line rules

Rules beat judgment under pressure. Give staff a short list of absolutes:

1. We never ask for passwords, one-time passcodes, or payment details by text, and neither does any legitimate vendor or bank.
2. Never tap links in unexpected texts. Navigate to the website yourself or use the official app.
3. Never call phone numbers provided inside a suspicious message. Look the number up independently.
4. Any texted request involving money, gift cards, credentials, or personal data must be verified by a second channel (a known phone number, an in-person check, or an internal ticket).
5. When in doubt, report it. No one will ever be criticized for flagging a message that turns out to be real.

Train against the actual formats

Abstract warnings fade; concrete patterns stick. Walk staff through the common archetypes, including fake delivery notices, fake bank alerts, unpaid toll demands, wrong-number conversations, and executive impersonation. Our companion library of smishing examples with illustrative sample texts is built for exactly this purpose and pairs well with a short internal session. Refresh the training on a recurring schedule and after any real incident.

Simulate, measure, improve

Organizations that run email phishing simulations should extend them to SMS. A simulated smishing exercise, run with clear internal authorization and consent boundaries, reveals whether the training transferred to the mobile channel. Track report rates, not just failure rates: a rising percentage of employees who report the simulation is the healthiest signal.

Layer 3: Reduce the Damage

Assume some smishing attempt will eventually succeed, and pre-position the response.

Contain credential theft

• Require multi-factor authentication on all organizational accounts, preferring app-based or hardware-key methods over SMS-delivered codes, since SMS codes are precisely what many smishing attacks harvest in real time.
• Establish a fast credential-reset path. An employee who realizes they typed a password into a fake page should be able to trigger a reset and session revocation within minutes, at any hour.

Contain financial fraud

• Enforce dual authorization for payments, wire transfers, and payroll changes, regardless of how the request arrives.
• Brief finance staff specifically on executive impersonation texts ("It's the director, I'm in a meeting, need gift cards for a donor thank-you"). The pattern is common enough that it deserves its own bright-line rule: no payment instrument is ever purchased or redirected based on a text alone.

Report every incident

Reporting is not paperwork; it is a control. Forward the message to 7726, file at ReportFraud.ftc.gov, and, when money or data was actually lost, file a complaint with the FBI IC3 at ic3.gov promptly. Fast IC3 reporting matters because the FBI's Recovery Asset Team can sometimes intervene in recent fraudulent transfers. Government-facing organizations can also report significant incidents to CISA.

Special Duty: Organizations That Send Texts

If your nonprofit, health system, school, or agency runs its own SMS program, you hold part of the public's smishing defense in your hands. Every unpredictable, spammy, or link-heavy message you send trains your community to click things that look like yours. Public-sector senders should take particular care, because residents cannot easily opt out of needing information from their government; our government solutions overview covers how agencies structure trustworthy resident messaging.

Sender-side prevention practices:

Codify these in a written policy and audit against it. A structured SMS compliance checklist turns these norms into a repeatable review.

A 30-Day Rollout Plan

You do not need a year to stand this up. A workable first month:

1. Week 1: Baseline and quick wins. Publish your official sender numbers, enable unknown-sender filtering on managed devices, and circulate the 7726 reporting habit.
2. Week 2: Policy. Adopt the bright-line rules, add dual authorization for payments if missing, and define the incident reporting path (7726, ReportFraud.ftc.gov, ic3.gov).
3. Week 3: Training. Run a 30-minute all-staff session using real-world format examples, and brief finance and IT teams on their targeted variants.
4. Week 4: Verify. Run a small authorized simulation or tabletop exercise, measure report rates, and schedule the recurring refresh.

Frequently Asked Questions

What is the single most effective way to prevent smishing?

No single control suffices, but the highest-leverage habit is independent verification: never act on a text's link, number, or request, and instead contact the organization through a channel you find yourself. Paired with multi-factor authentication and dual authorization for payments, it defeats most smishing outcomes even when the message is convincing.

Can technology block smishing entirely?

No. Carrier filtering, 7726 reporting, and device-level spam controls remove a large share of scam texts, but SMS lacks the mature authentication stack of email, and some messages will always get through. That is why prevention programs layer technical controls with training and damage-limiting policies.

Should employees use SMS codes for multi-factor authentication?

App-based authenticators or hardware security keys are preferable where available, because real-time smishing attacks are specifically designed to harvest SMS one-time codes. SMS-based MFA is still far better than no MFA, but treat any request to read back or enter a code from an unexpected prompt as an attack.

How do we run a smishing simulation legally and ethically?

Get explicit internal authorization, limit the exercise to consenting organizational contacts on documented terms, avoid impersonating real third-party brands or agencies, and debrief participants promptly. The goal is measurement and practice, not embarrassment, so report aggregate results and reward reporting behavior.

Where should our organization report smishing attacks?

Forward the message to 7726 (SPAM), report the fraud to the FTC at ReportFraud.ftc.gov, and file with the FBI Internet Crime Complaint Center at ic3.gov whenever money or sensitive data was lost. Agencies and critical infrastructure organizations can additionally report significant incidents to CISA.

Build a Texting Program People Can Trust

FRANSiS helps nonprofits, healthcare organizations, schools, and government agencies run consent-based, registered SMS programs, with an AI Powered Helper handling two-way conversations so your community always knows your real messages when they see them. Contact us to talk through your messaging and prevention posture.