A compliance officer should cooperate with the law enforcement inquiry as much as possible, but also ensure that the request is valid, lawful, and does not violate any confidentiality or privacy obligations. Therefore, the compliance officer should collaborate with the FI's designated department, such as the legal counsel, the senior management, or the board of directors, to determine the appropriate course of action to comply with the request12. The compliance officer should also ensure that all communication, written and oral, is funneled through a centralized place, and that the FI maintains a record of the request and the response12.
References:
1: Requests by Law Enforcement for Financial Institutions to Maintain Accounts, FinCEN, 2014
2: Best Practices for Compliance and Enforcement-Related Information Requests, EPA, 2018 Reference: https://www.acams.org/en/resources/aml-glossary-of-terms

Conducting anonymous transactions is the most likely activity to facilitate money laundering through online banking systems with inadequate controls. Anonymous transactions allow money launderers to hide their identity, source and destination of funds, and the purpose of their transactions from the authorities and the financial institutions. Online banking systems that do not have proper KYC, customer due diligence, and transaction monitoring controls are vulnerable to being exploited by money launderers who can use various techniques, such as encryption, proxy servers, virtual currencies, prepaid cards, and online gambling, to conduct anonymous transactions123.
References:
* ACAMS CAMS Certification Study Guide, 6th Edition, Chapter 2, page 40-41, 43-44
* ACAMS CAMS Certification Video Training Course, Module 2, Lesson 2.4, Money Laundering Using New Payment Methods
* 1, Fighting money laundering in the age of online banking, virtual currencies and internet gambling | ERA Forum
* 2, Financial crime risk management in digital payments | McKinsey
* 3, The Relationship Between Digital Banking and Financial Crime