How to Detect Transaction Launderers Using Your Bank’s Brand

Illegal transactions often go unnoticed in the digital payment world because of seemingly compliant onboarding paperwork and aesthetically pleasing websites. Transaction laundering is a common but intricate type of fraud that can be a major roadblock for acquirers and payment processors.

Understanding the complexities of transaction laundering

Transaction laundering involves fraudsters using their merchant account to process payments for illegal goods or services sold elsewhere. But a lot happens behind the scenes, making it a complex fraud case. To evade detection, individuals engaged in illicit activities often run multiple fraudulent businesses, frequently alter their front-facing websites (the official site a merchant presents to acquirers during onboarding, usually showcasing legitimate products), and maintain standby accounts with various financial institutions. They are more than just rogue merchants.

The real challenge? These transactions often look legitimate on paper. The websites pass initial due diligence, and the product listings appear to be real. But behind the scenes, the same merchant could be operating a parallel site selling unregulated pharmaceuticals, counterfeit goods, or high-risk services—all routed through the payment rails of a business claiming to sell flower bouquets or electronics accessories.

Why are acquirers struggling to identify transaction laundering?

For several reasons, transaction laundering has become more widespread and challenging to track.

• Lower entry barriers to appear legitimate: Fraudsters can now quickly create polished websites with checkout pages and shopping carts.

• Outsourced onboarding: To save money, banks are increasingly relying on third parties, such as payment service providers, independent sales organizations (ISOs), or payment facilitators, to manage merchant acquisition. It’s possible that some of the downstream partners lack the resources or know-how to conduct thorough due diligence.

• Alternative payment methods: Traditional risk controls may not apply to newer, less-regulated payment methods.

• Redundancy and volume: Well-structured networks operate independently of a single merchant account. They use multiple accounts to ensure operational continuity if an account is terminated. Terminated merchants often re-emerge in portfolios with slight modifications to their websites or company names to circumvent detection.

Transaction laundering types

It is crucial to understand that transaction laundering takes various forms:

• Non-compliant aggregation: When a merchant accepts payments from another website that is unknown to the acquirer, this is known as non-compliant aggregation, even if the products or services are lawful.

• Illegal aggregation (without miscoding): A merchant processes transactions for another website that offers illicit goods or services using their authorized merchant identification number (MID), which closely resembles their high-risk but compliant front website.

• Illegal aggregation (with miscoding): To evade detection, fraudsters use a low-risk MCC to route high-risk transactions through their MID.

• Third-party laundering: When a business without the required facilitator license handles payments on behalf of another business, they are essentially acting as an unauthorized middleman.

All these variants of transaction laundering (except perhaps the first one) have one thing in common: they create a convoluted trail intended to conceal the true source and destination of the money, often in violation of regulations.

Challenges behind transaction laundering investigations

Investigating transaction laundering is similar to peeling an onion. You discover a network of linked domains, entities, and shell accounts rather than a single merchant running a single rogue website. Our analysts have even seen instances of transaction laundering as a service, in which insiders at payment companies offer unidentified third parties access to clean merchant accounts.

Static compliance reviews and one-time Know Your Business (KYB) checks are insufficient to combat this type of structural fraud. It is critical for PSPs and acquirers to continuously monitor merchants’ online activities before and after onboarding.

How to prove transaction laundering

Identifying red flags alone is insufficient when establishing instances of transaction laundering. Most of the time, even solid evidence won’t be enough to make a case. For instance, a merchant’s contact information may appear on shady forums, or the prices may not match the products listed. But it’s easy to ignore these signs if they don’t point to illegal transactions.

A more definitive method is to follow live transactions from high-risk websites back to approved MIDs. This method can reveal the connection between an illicit website and the merchant account that processes payments, but it requires specialized tools, a monitoring system, and knowledge of the domain.

Why detection tools matter and how G2 Risk Solutions helps

Standard compliance tools often fall short because they aren’t designed to track merchants’ online behavior over time. We can help. Our brand detection tool continuously monitors the use of your brand name in connection with the sale of illegal goods and regulated items on e-commerce sites all over the web, all the time.

G2 Risk Solutions uses both automated detection and expert validation. That means you don’t just get alerts; you also get context, evidence, and reports to make informed decisions about enforcing regulations. Our analysts help you cut through the noise, identify real threats, and take immediate action, whether that means terminating a merchant or referring the case to your fraud or legal teams.

Learn more about how G2 Risk Solutions can protect your business.