Protecting Your Small Business from Invoice Fraud

Understanding Invoice Fraud against SMEs in Canada 

According to a TransUnion survey, Canadian businesses lost the equivalent of 7.2% of revenues to fraud over the past year, totalling an estimated CAD $111 billion — up 42% from the previous year. Only 22% of businesses recovered three-quarters or more of their stolen funds in 2024, while 30% couldn’t reclaim anything at all. 

A 2024 alone, Payments Canada study found that one in five Canadian businesses experienced payment fraud in the prior six months, with impersonation fraud from a phone call, message or email appearing to be from a trusted business source being the most common. 

Invoice fraud is a form of cyber crime where criminals manipulate payment processes to divert funds. It often begins with compromised email accounts, stolen credentials or exposed supplier information. Fraudsters monitor communications and then send legitimate-looking invoices with altered payment details. In many cases, businesses believe they are paying a trusted supplier. 

Common invoice fraud tactics include: 

• Fake invoices impersonating legitimate vendors 
• Requests to update banking details 
• Duplicate invoice requests claiming unpaid balances 
• Payment redirection to fraudulent accounts

Because these invoices often appear authentic, even experienced teams can miss the warning signs. 

Common Types of Invoice Fraud

Fake vendor invoices 

Cyber fraudsters create invoices that appear to come from legitimate suppliers, often using real company names and branding. 

 Altered payment details 

 Criminals intercept real invoices and modify banking information to redirect payments. These cases illustrate how even established organizations can be caught off guard when a trusted email account is compromised. 

Business Email Compromise 

Over 60% of Canadian business leaders reported their customers had been victimized by fraudsters impersonating their brand in an email in the past year, according to a 2025 TransUnion study. 

Vendor email compromise attacks surged 137% in 2023 and 63% of organizations now cite business email compromise as their number one avenue for fraud attempts.  

Criminals gain access to vendor or employee email accounts and request payment changes. Because the communication appears legitimate, these requests are often trusted. 

Attack surface management tools help reduce this risk by identifying exposed email accounts, compromised credentials and vulnerabilities that attackers may exploit – including protecting your entire supply chain.  

Every Cyberboxx® Business insurance policy comes with always-on Cyberboxx® Assist services that includes attack surface monitoring to help businesses detect digital threats and close these gaps before fraud occurs. 

Warning Signs: How to Spot a Fraudulent Invoice 

Small and medium-sized businesses are often more vulnerable to invoice fraud because they typically have high-trust cultures, fewer internal controls and limited cyber security resources — all of which fraudsters are adept at exploiting. 

Businesses should watch for: unexpected changes to banking details, urgent payment requests, unknown vendors, payment instructions that differ from previous invoices and email domains that do not match supplier addresses. Even small inconsistencies can indicate fraud. 

Cyberboxx Assist® includes continuous dark web monitoring and credit monitoring to help identify exposed credentials and financial information early.

Essential Steps for Invoice Fraud Prevention

• Implement invoice verification procedures: Always verify payment changes using a separate and known communication channel such as a phone call to a number held on file for the third party to verify the instructions are legitimate.
• Train employees to recognize fraud: Employees and accounting teams should understand common fraudulent tactics regarding invoice fraud and report suspicious requests.
• Strengthen internal approval controls: Require approvals for payment changes or large transactions.
• Monitor supplier relationships: Confirm payment details regularly and verify unexpected changes through known sources to protect your supply chain. 

How Cyber Insurance and Security Protects Your Business 

Businesses should implement automated invoice processing, email security tools like Multi-Factor Authentication, payment verification systems and cyber security monitoring.  

Attack surface management, dark web monitoring and credit monitoring – all included in a Cyberboxx® Business policy – help identify exposed accounts and stolen credentials that could be used in invoice fraud attacks. 

With BOXX, businesses can continuously monitor these risks and get real-time alerts to potential threats so they can act fast. If suspicious activity is detected, BOXX Hackbusters® breach response experts provide real human guidance to help contain and investigate the incident. 

What to Do If Your Business Suspects Invoice Fraud 

Speed matters. BOXX Hackbusters® provide immediate and 24/7 incident response support to help businesses contain threats and prevent financial loss. In fact, the Hackbusters team prevents over 80% of cyber incidents from escalating into insurance claims by intervening early. Early intervention with the team Hackbusters team allows them to engage the right experts, secure systems and begin recovery actions before the situation escalates. 

Key steps for businesses suspecting invoice fraud:  

• Stop the payment immediately if possible 
• Contact your financial institution 
• Report the incident  
• Engage cyber security experts. If you’re a BOXX policy holder, call the BOXX Hackbusters® breach response experts, who will help investigate incidents, contain threats and guide businesses through recovery. 

Staying Ahead of Evolving Fraud Threats

Invoice fraud is not just an accounting issue. It is an overall risk management issue that can cause devastating financial and reputational harm to small businesses. Prevention, training and awareness remains the most effective first line of defence. 

Businesses that combine employee awareness, strong internal controls and all-in-one cyber insurance and protection are best positioned to prevent fraud. 

BOXX helps businesses continuously monitor for invoicing fraud and other cyber threats so they can stay ahead of evolving cyber risks.

Protecting your business from invoice fraud protects your finances, operations and long-term success.