Business Email Compromise: How Cybercriminals Trick Small Businesses Into Sending Money

Imagine receiving an email from a vendor you've worked with for years.

The invoice looks normal. The company name is correct. The amount matches what you're expecting.

There's just one small change: the vendor says they've updated their banking information.

Your accounting department makes the payment.

A week later, the real vendor calls asking why their invoice hasn't been paid.

That's when you discover the money went to a cybercriminal.

This is one example of Business Email Compromise (BEC), a type of fraud that uses email impersonation, compromised accounts, and social engineering to trick businesses into sending money or sharing sensitive information.

And it's a threat every small business owner should understand.

The good news is that businesses can take practical steps to reduce their risk—many of which don't require expensive technology.

What Is Business Email Compromise?

Business Email Compromise is a type of scam in which a criminal uses email to impersonate someone the recipient trusts.

That person might appear to be:

• The business owner or CEO

• A manager or supervisor

• A vendor or supplier

• An accountant or bookkeeper

• A customer

• An attorney or other professional contact

The criminal's goal is usually to convince someone to send money, change payment information, purchase gift cards, or disclose sensitive information.

Unlike many traditional phishing attacks, BEC scams don't always include suspicious links or malicious attachments.

Sometimes the entire attack is simply a convincing email asking an employee to do something that seems like a normal part of their job.

That's what makes these scams particularly dangerous.

1. The Fake Invoice Scam

One of the most common BEC scenarios involves a fraudulent invoice or payment instruction.

Here's how it might happen.

Your business regularly receives invoices from a trusted supplier.

A criminal learns about that relationship and sends an email claiming the supplier has changed banks.

The message might say:

"Please note that we've updated our banking information. Beginning with this month's invoice, please send all payments to the new account listed below."

The email may include a familiar logo, the correct vendor name, and details that make the request appear legitimate.

In some cases, criminals have gained access to a real email account and can reference previous conversations or invoices.

An employee processes the payment without independently confirming the change.

Unfortunately, the new bank account belongs to the criminal.

The most important lesson: Never change a vendor's payment information based solely on an email request.

Instead, verify the change by calling a known, trusted phone number already on file—not a number included in the suspicious email.

2. The Urgent Request from the Boss

Another common BEC tactic involves impersonating a company executive.

An employee might receive an email that appears to come from the owner or CEO.

The message might say:

"I'm in a meeting and need you to process a payment immediately. I'll explain later. Please keep this confidential."

The criminal is relying on two things:

Authority: Employees may be reluctant to question a request that appears to come from the boss.

Urgency: The message creates pressure to act quickly without following normal procedures.

These scams sometimes involve wire transfers, gift cards, or changes to payroll information.

They may also come from an email address that looks nearly identical to the executive's real address.

For example, a criminal could register a domain with a subtle spelling difference that an employee might overlook.

A good business process should allow employees to verify unusual financial requests—even when those requests appear to come from senior management.

No legitimate business payment should be so urgent that basic verification becomes optional.

3. Why These Emails Can Look So Convincing

Many business owners assume scam emails are easy to recognize.

They picture messages filled with spelling mistakes, suspicious links, and strange formatting.

Some scams still look like that.

But sophisticated BEC attacks can be much harder to identify.

Criminals may use several methods to make their messages appear legitimate.

Compromised Email Accounts

If a criminal gains access to a real employee or vendor email account, they may be able to send messages from an address the recipient already trusts.

They may also see previous conversations, invoices, and business relationships.

That information can help them create a believable request.

Lookalike Email Domains

Criminals may register domains that resemble legitimate company domains.

A small spelling difference can be easy to miss, especially when someone is busy.

Information Gathered Online

Company websites, social media, and public business information can reveal employee names, job titles, and vendor relationships.

Criminals can use this information to make fraudulent messages sound more authentic.

AI-Assisted Messages

AI tools can help criminals write professional-looking messages with convincing grammar and tone.

That means poor spelling is no longer a reliable way to identify a scam.

A professional-looking email isn't necessarily a legitimate email.

4. Warning Signs Your Employees Should Recognize

Although BEC scams can be convincing, certain requests should trigger additional verification.

Watch for:

• Unexpected changes to vendor banking information

• Urgent requests to send money

• Instructions to keep a payment confidential

• Requests to bypass normal approval procedures

• Unusual gift card purchases

• Changes to employee direct-deposit information

• Email addresses with subtle spelling differences

• Requests that seem out of character for the sender

• Pressure to avoid phone calls or other verification

None of these signs automatically proves that a message is fraudulent.

But they are good reasons to stop and verify the request before taking action.

5. How Small Businesses Can Protect Themselves

Preventing Business Email Compromise requires a combination of technology, employee awareness, and good financial procedures.

Here are several practical steps every business should consider.

Require Independent Payment Verification

This may be the single most important step for preventing payment-related BEC fraud.

When a vendor requests new banking information, verify the change through a separate, trusted communication channel.

Call a phone number already stored in your records or obtained independently from a verified source.

Don't rely on contact information supplied in the email requesting the change.

Businesses should also establish clear procedures for approving unusual or high-value payments.

For example, requiring a second person to review certain transactions can provide an additional safeguard.

Enable Multi-Factor Authentication

Multi-factor authentication (MFA) adds another layer of protection to business accounts.

If someone steals an employee's password, MFA can make unauthorized access more difficult.

However, MFA isn't a complete solution by itself.

Attackers may still attempt phishing, session theft, or fraudulent authentication requests.

Businesses should use appropriate MFA methods, monitor suspicious sign-ins, and encourage employees to report unexpected authentication prompts.

Strengthen Email Security

Email security tools can help identify suspicious messages, malicious links, impersonation attempts, and other threats.

Businesses should also properly configure email authentication technologies such as SPF, DKIM, and DMARC.

These technologies help receiving mail systems evaluate whether messages are authorized to use a domain.

They can reduce certain types of email spoofing, but they won't stop every BEC attack—especially messages sent from legitimate compromised accounts or convincing lookalike domains.

That's why email security should be one part of a broader strategy.

Train Employees to Recognize Fraud

Employees who handle invoices, payroll, vendor relationships, and financial transactions should understand how BEC scams work.

Training should focus on realistic situations employees might encounter.

For example:

• A supplier suddenly changes its bank account.

• A manager requests an urgent wire transfer.

• An employee asks payroll to update direct-deposit details.

• A familiar vendor sends an unusual request.

Employees should know how to verify these requests and who to contact when something seems suspicious.

Just as importantly, they should feel comfortable questioning a request without worrying about getting in trouble.

Keep Business Accounts Secure

Strong account security helps reduce the chance that criminals can access legitimate email accounts.

That includes:

• Using unique passwords and a password manager

• Enabling MFA

• Keeping systems and applications updated

• Reviewing suspicious sign-in activity

• Removing access when employees leave

• Limiting unnecessary administrative privileges

These measures help reduce opportunities for attackers to compromise accounts and impersonate trusted people.

6. What If Your Business Falls for a BEC Scam?

Even well-prepared businesses can make mistakes.

If your business sends money to a fraudulent account, time matters.

Take action immediately.

Contact Your Financial Institution

Notify your bank or payment provider as soon as possible.

Explain that you suspect a fraudulent transfer and ask whether the payment can be recalled, stopped, or recovered.

If the transaction was a wire transfer, the bank may be able to initiate a recall or contact the receiving financial institution.

Recovery is not guaranteed, but acting quickly can improve the chances.

Notify Your IT Provider

If the incident involved a suspicious or compromised email account, your IT provider should investigate.

Depending on the situation, that may include securing affected accounts, reviewing sign-in activity, revoking sessions, checking mailbox rules and forwarding settings, and determining whether additional accounts were affected.

Preserve Evidence

Keep copies of relevant emails, payment instructions, transaction records, and other communications.

This information may be useful to your bank, investigators, insurer, or legal counsel.

Report the Incident

In the United States, businesses can report internet-enabled fraud to the FBI's Internet Crime Complaint Center at IC3.gov.

You may also need to notify your cyber insurance provider and follow any applicable reporting requirements.

Your legal or insurance advisors can help determine whether additional notifications are necessary.

Review What Happened

After the immediate situation is addressed, identify how the fraudulent request succeeded.

Was a vendor's banking information changed without verification?

Did an employee bypass an approval process?

Was a legitimate email account compromised?

Understanding what happened can help your business improve its procedures and reduce the chance of a similar incident.

7. Cybersecurity Isn't Just About Protecting Computers

When business owners think about cybersecurity, they often think about antivirus software, firewalls, and hackers breaking into computers.

Those protections matter.

But Business Email Compromise highlights another important reality:

Cybercriminals don't always need to break into your systems to steal from your business. Sometimes they only need to convince someone to send them money.

That's why effective cybersecurity also involves the way employees communicate, approve payments, and verify unexpected requests.

Your IT provider can help protect email accounts, monitor suspicious activity, configure security controls, and train employees.

But your business also needs clear financial procedures that employees understand and consistently follow.

Technology and business processes work best together.

One Simple Question Every Business Owner Should Ask

If a trusted vendor emailed your accounting department tomorrow and asked to change its banking information, what would happen next?

Would someone independently verify the request?

Would a second person approve the change?

Or would the new information simply be entered into your accounting system?

The answer can tell you a lot about your exposure to payment fraud.

A few minutes of verification could prevent a costly mistake.

Protect Your Business Before a Convincing Email Arrives

Business Email Compromise is a reminder that not every cyberattack looks like a technical attack.

Sometimes it looks like a routine invoice, a message from the boss, or a quick request from a familiar vendor.

The best defense combines secure email systems, strong authentication, employee awareness, and consistent payment verification procedures.

At Black Dog IT Solutions, we help small businesses improve their cybersecurity, protect Microsoft 365 environments, and strengthen the technology systems they rely on every day.

If you're unsure whether your business is adequately protected against email-based threats, we can help review your current security measures and identify practical improvements.

Contact Black Dog IT Solutions to discuss how we can help protect your business from email threats and account compromise.