What is money laundering? Simple guide with examples (2026) | SiennaDocs

Q: Are "money laundering" and "blanqueo de capitales" the same thing?

Yes. Blanqueo de capitales is the term used in Spain and other Spanish-speaking countries; in Mexico we speak of money laundering or operations with resources of illicit origin.

What money laundering is, how it works in 3 stages, and why your business may be legally required to prevent it in Mexico. Explained simply, with real examples.

Pablo Rodríguez · July 25, 2026

The UN estimates that between 2% and 5% of global GDP is laundered through the financial system each year.

What is money laundering? Simply explained, with real examples

If you hear "money laundering" and think of drug cartels, briefcases full of cash, and Netflix series, you are not entirely wrong… but you are missing half the story. The other half is much closer to your business than you imagine: today, in Mexico, a real estate firm, a jewelry shop, a car dealership, or even someone leasing out a commercial unit may be legally required to prevent money laundering. And not complying is expensive.

In this guide we explain, without jargon, what money laundering is, how it works, and why it concerns you — even if your business is 100% honest.

The definition, in one sentence

Laundering money is making money that comes from a crime look like legitimate money.

A criminal who makes millions selling drugs, extorting, or evading taxes has a practical problem: they cannot show up at a bank with sacks of cash and say "this is mine". That money is "hot". Money laundering is the whole process of "cooling it down": moving it, disguising it, and reintroducing it into the formal economy until it looks like the normal income of a business, an inheritance, or the sale of a property.

In legal terms, in Mexico this is called operations with resources of illicit origin, and it is a crime defined in Article 400 Bis of the Federal Criminal Code.

How it works: the 3 stages of laundering

Almost every scheme, however sophisticated it may seem, follows three steps:

1. Placement

This is the moment of getting "dirty" cash into the financial system or into the formal economy. It is the riskiest stage for the criminal, because the money is still "hot". Example: depositing cash into many different accounts, buying goods in cash, or mixing it with the sales of a cash-based business.

2. Layering (or concealment)

Here the goal is to erase the trail. The money is moved through many operations so that it becomes impossible to follow: transfers between companies, purchases and sales of goods, loans between related companies, cross-border operations. The more layers, the harder it is to trace where it came from.

3. Integration

The money "returns" already clean, with a credible explanation. It now appears as a company's profit, the sale of a property, or the repayment of a loan. From this point on, the criminal can use it openly without raising suspicion.

Quick analogy: imagine washing a stained shirt. First you put it in the washing machine (placement), then you rinse it several times so no trace remains (layering), and finally you hang it up next to the clean clothes as if it had never been dirty (integration).

Real examples (more common than you think)

Structuring or "smurfing" (pitufeo): breaking a large deposit into many small ones to avoid triggering alerts. Instead of depositing $500,000 at once, someone makes 20 deposits of $25,000.
Shell company (empresa fachada): a business that invoices far more than it actually sells (for example, a car wash that "serves" hundreds of phantom customers) in order to justify the inflow of cash.
Purchase of high-value goods in cash: real estate, luxury cars, jewelry, or watches paid in cash, which are then resold to obtain "clean" money.
Overvaluation: selling a property far above its real value to justify the inflow of a large amount of money.
Simulated loans: the criminal "lends" their own money to themselves through a company, so the cash appears as a legitimate credit.

Notice how several of these examples run through entirely normal sectors: real estate, cars, jewelry, lending. That is why the law involves those businesses.

Why does this matter if your business is honest?

Here is the key point that many entrepreneurs overlook.

Mexican law does not just prosecute those who launder money: it also asks for help from businesses that, unwittingly, could be used to launder it. The Federal Law for the Prevention and Identification of Operations with Resources of Illicit Origin (LFPIORPI, or Mexico's AML Act) has as its purpose to protect the financial system and the national economy by detecting these types of operations (Article 2 of the Act).

To achieve this, it defines a list of vulnerable activities: lines of business that, by their nature, are attractive for money laundering. If your business performs any of them, you become a regulated party (sujeto obligado), which means you must identify your clients, keep files, and — in certain cases — file reports with the authority.

To be clear: being a regulated party does not make you a suspect or an accomplice to anything. It simply makes you part of the country's prevention system, like someone who keeps fire extinguishers in their premises: it is not that they expect a fire, it is that the law requires them to be prepared.

Who oversees all this in Mexico?

The UIF (Financial Intelligence Unit): the area within the Ministry of Finance that analyzes information and detects suspicious patterns.
The SAT: receives the reports from vulnerable activities, manages the registry, and conducts audits.
The FGR: investigates and prosecutes the crime when there are indications.

Your role as a business is one of prevention: identify your clients properly and report what the law requires. You do not have to investigate anyone or "catch" criminals. That is the job of the authorities.

Prevention is easier (and cheaper) than remediation

The good news is that complying with the AML Act does not have to be a headache. It is about being organized: knowing who your clients are, keeping the right documentation, and filing your reports on time. Problems appear when all of that is scattered across spreadsheets, emails, and folders that no one can find the day a SAT audit shows up.

At SiennaDocs we centralize and automate that compliance: well-assembled client files (KYC), threshold control, report generation, and all your supporting documentation in a single place. That way, preventing money laundering stops being a burden and becomes a natural part of your operation. Book a demo and we will show you how it looks in your industry.

Frequently asked questions

Are "money laundering" and "blanqueo de capitales" the same thing? Yes. Blanqueo de capitales is the term used in Spain and other Spanish-speaking countries; in Mexico we speak of money laundering or operations with resources of illicit origin.

Is handling a lot of cash money laundering? Not necessarily. Many legitimate businesses operate in cash. What the law monitors are certain amounts and specific operations, which is why there are limits on the use of cash in purchases such as real estate, cars, or jewelry (Article 32 of the LFPIORPI).

Is my business required to do anything? It depends on your line of business. If you perform any of the vulnerable activities listed in Article 17 of the Act, yes. In our 2026 vulnerable activities guide you can check it in minutes.

What happens if I do not comply? Fines can be very high (ranging from thousands to tens of thousands of times the UMA, and even a percentage of the value of the operation). Non-compliance can also escalate into tax and criminal issues.

This content is informational and does not constitute legal advice. AML regulations are updated frequently; always verify the current version of the LFPIORPI and its general rules, or consult a specialist.