According to the Financial Action Task Force (FATF), the global standard-setter for anti-money laundering and counter-terrorist financing, two channels that can be utilized during a cross-border money laundering investigation to assist in gathering information are contacting existing liaison officers in the foreign jurisdiction and exchanging information between national law enforcement agencies. These are two of the methods that the FATF recommends in its guidance on international cooperation1. The FATF states thatliaison officers can facilitate the exchange of information and intelligence, provide operational support, and coordinate joint investigations1. The FATF also encourages the use of bilateral or multilateral agreements or arrangements to enable the exchange of information and intelligence between national law enforcement agencies, as well as the use of informal networks or mechanisms, such as the Egmont Group of Financial Intelligence Units1.

Option C is incorrect because contacting the potential suspect or their family members to request information is not a recommended channel for cross-border money laundering investigations. This method may alert the suspect of the investigation, compromise the confidentiality of the information, or violate the legal rights of the suspect or their family members. Moreover, the information obtained from the suspect or their family members may not be reliable or admissible in court.

Option D is incorrect because submitting only formal requests for information to a financial intelligence unit (FIU) is not a sufficient channel for cross-border money laundering investigations. While FIUs play an important role in collecting, analyzing, and disseminating financial information, they are not the only source of information for cross-border investigations. The FATF guidance states that investigators should also seek information from other competent authorities, such as law enforcement, supervisory, or judicial authorities, depending on the nature and purpose of the information sought1. Furthermore, the FATF guidance advises investigators to use both formal and informal channels of communication, as formal requests may take longer or face legal obstacles1.

1: FATF, International Co-operation Review Group, Guidance on Investigating and Prosecuting Money Laundering and the Financing of Terrorism, October 2012, pp. 13-18.