Which entity's guidelines require verification of customers' identities conducting significant transactions?

The Financial Action Task Force (FATF) is known for setting international standards and guidelines aimed at combating money laundering and terrorist financing. One of the core components of FATF's recommendations is the requirement for financial institutions and other relevant entities to implement measures that verify the identities of customers who are conducting significant transactions. This procedure is part of a broader risk-based approach to customer due diligence (CDD) to ensure that entities can detect and prevent potential illicit activities.

By establishing clear guidelines for customer identification, FATF aims to enhance transparency within the financial system. This is crucial for protecting both financial institutions and the integrity of the broader economic system against the risks associated with money laundering. Therefore, the correct answer is tied closely to FATF's emphasis on the importance of knowing your customer (KYC) and verifying identities as part of effective risk management strategies.

The other entities mentioned, while also involved in regulatory frameworks and oversight, focus on different aspects of financial regulation and do not specifically mandate the verification of customer identities in the same way as the FATF does.