This is when a customer or a transaction does not provide sufficient or credible information about their identity, source of funds, business activity, or purpose of the transaction. Lack of transparency can indicate that the customer or the transaction is trying to conceal the origin, ownership, or destination of illicit funds, or to evade regulatory scrutiny or reporting obligations. Lack of transparency is a common risk factor for money laundering and terrorist financing, especially in high-risk jurisdictions or sectors.
The other options are not necessarily red flags, although they may increase the risk or require further due diligence depending on the circumstances and the risk profile of the customers and countries involved. Option A describes a referral by a longtime friend of the dealer, which may be a legitimate source of trust or business relationship, but it does not substitute the need for proper customer identification and verification. Option B describes the location of the precious metals dealer, which may be a high-risk jurisdiction due to factors such as weak governance, corruption, crime, or sanctions, but it does not imply that the dealer or the customer is involved in money laundering. Option C describes the amount and nature of the transaction, which may be unusual or large, but it does not necessarily indicate money laundering, as long as the customer can provide a reasonable explanation and evidence for the source and use of funds.
:
ACAMS CAMS Certification Video Training Course - 6th Edition1
Exam CAMS: Certified Anti-Money Laundering Specialist (the 6th edition)2 ACAMS CAMS Study Guide - 6th Edition, Chapter 3, pages 64-65: https://www.acams.org/wp-content/uploads/2019/09/ACAMS-CAMS-Study-Guide-6th-Edition-Chapter-3.
pdf

According to the Wolfsberg Financial Crime Principles for Correspondent Banking1, a shell bank is defined as a bank that has no physical presence in the jurisdiction in which it is incorporated and licensed, and which is unaffiliated with a regulated financial group that is subject to effective consolidated supervision. Physical presence means meaningful mind and management located within a country. The existence simply of a local agent or low level staff does not constitute physical presence. Therefore, a shell bank meets the criteria A, B, and D, as it does not conduct business at a fixed address, does not employ one or more individuals or maintain operating records at that address, and is not subject to inspection by the banking authority that licensed it.
Criterion C is not specific to shell banks, as any bank, whether shell or not, may or may not be subject to AML laws that require it to implement an AML program, depending on the jurisdiction.
:
Wolfsberg Financial Crime Principles for Correspondent Banking1, Section: Definitions, pp. 3-4.

Before disclosing any supporting documentation for a suspicious transaction report (STR) to a law enforcement agency, the financial institution should confirm thatthe request is legitimate and authorized by verifying the identity and credentials of the requester1. This is to prevent unauthorized access or misuse of the confidential information by impostors or fraudsters. The other options are not true, as they may either compromise the security, integrity, or timeliness of the disclosure, or violate the confidentiality or privacy rights of the customer.
:
ACAMS, CAMS Examination Study Guide, 6th Edition, Chapter 4, p. 117
FATF Guidance: The Role of Hawala and Other Similar Service Providers in Money Laundering and Terrorist Financing, October 20132, p. 20 Basel Committee on Banking Supervision, Sound management of risks related to money laundering and financing of terrorism, June 20173, p. 11 Reference:https://www.sec.gov/about/offices/ocie/aml2007/fin-2007-g003.pdf

Chip dumpingis a commonmoney laundering techniquein online gambling.
* Option D (Correct):Chip dumpingoccurs whenplayers colludetotransfer fundsvia staged betting, making illicit funds appear as gambling winnings.
* Option A (Incorrect):Concealmentis a broad term, not a specific technique.
* Option B (Incorrect):Coordinated bettingrefers tomatch-fixing, not money laundering.
* Option C (Incorrect):Player-to-player transfersare used in money laundering but arenot specific to online gambling.
Reference:FATF Report on Virtual Assets and Online Gambling (2021), Wolfsberg Group Gaming AML Guidelines.

Layering is the second stage of the money laundering process, in which the launderer moves the funds around to create distance and confusion between the source and the destination of the illicit proceeds. Layering often involves multiple transactions, such aswire transfers, shell companies, trusts, and offshore accounts, that make it difficult to trace the origin and ownership of the funds. Layering is intended to disguise the audit trail and provide anonymity for the launderer12.
Placement is the first stage of the money laundering process, in which the launderer introduces the illicit proceeds into the financial system, often by breaking them into smaller amounts or using cash-intensive businesses12.
Structuring is a technique used in the placement stage, in which the launderer deposits or withdraws cash in amounts below the reporting threshold to avoid detection or suspicion12.
Integration is the third and final stage of the money laundering process, in which the launderer reintroduces the funds into the legitimate economy, often by purchasing assets, investing in businesses, or mixing them with legal income12.: 1: ACAMS (2020), Study Guide for the Certification Examination, 6th Edition, ACAMS, Miami, FL, USA, www.acams.org/en/cams-certification-package-6th-edition, pp. 12-14. 2: ACAMS (2020), CAMS Examination Preparation Video, 6th Edition, ACAMS, Miami, FL, USA, www.acams.org/en/cams- certification-package-6th-edition, Module 1.