The most effective tool used to detect structured transactions is

Structured transactions are a common method of money laundering, where large amounts of cash are broken down into smaller deposits or withdrawals to avoid reporting thresholds or detection. The most effective tool to detect such transactions is a software program that can link apparently unrelated transactions by using various criteria, such as customer name, address, account number, identification number, transaction amount, date, time, location, etc. Such a program can help identify patterns, trends, and anomalies that may indicate money laundering activity.

ACAMS CAMS Certification Study Guide1, Chapter 2: Money Laundering Risks and Methods, Section 2.2: Common Money Laundering Methods, pp. 51-52

ACAMS CAMS Certification Video Training Course2, Module 2: Money Laundering Risks and Methods, Lesson 2.2: Common Money Laundering Methods

ACAMS CAMS Certification Exam Outline3, Domain 2: Compliance Standards for Anti-Money Laundering (AML) and Combating the Financing of Terrorism (CFT), Task 2.2: Implement risk-based CDD, EDD and ongoing due diligence policies, procedures and processes, p. 13