Money laundering

The basic money laundering process has three steps:

1. Placement - At this stage, the launderer inserts the dirty money into a legitimate financial institution. This is often in the form of cash bank deposits. This is the riskiest stage of the laundering process because large amounts of cash are pretty conspicuous, and banks are required to report high-value transactions.
2. Layering - Layering involves sending the money through various financial transactions to change its form and make it difficult to follow. Layering may consist of several bank-to-bank transfers, wire transfers between different accounts in different names in different countries, making deposits and withdrawals to continually vary the amount of money in the accounts, changing the money's currency, and purchasing high-value items (boats, houses, cars, diamonds) to change the form of the money. This is the most complex step in any laundering scheme, and it's all about making the original dirty money as hard to trace as possible.
3. Integration - At the integration stage, the money re-enters the mainstream economy in legitimate-looking form -- it appears to come from an legal transaction. This may involve a final bank transfer into the account of a local business in which the launderer is "investing" in exchange for a cut of the profits, the sale of a yacht bought during the layering stage or the purchase of a $10 million screwdriver from a company owned by the launderer. At this point, the criminal can use the money without getting caught. It's very difficult to catch a launderer during the integration stage if there is no documentation during the previous stages.