According to the Egmont Group of Financial Intelligence Units, which is a network of over 160 FIUs that promotes international cooperation and information exchange, FIUs should share information with foreign FIUs spontaneously, without prior request, when they have reasonable grounds to believe that the information is relevant for the receiving FIU1. This principle is also reflected in the FATF Recommendation 40, which states that FIUs should exchange information with other FIUs, especially when this information concerns money laundering, predicate offences, or terrorist financing2. Spontaneous information sharing can enhance the effectiveness of FIUs, as it can help to identify new leads, trends, patterns, or typologies, as well as to prevent or disrupt criminal activities1.
The other options are not consistent with the best practices of FIU information sharing. For example:
In accordance with Wolfsberg guidelines, submit the information to the other FIU in written form. The Wolfsberg Group is an association of 13 global banks that issues guidance and standards on anti-money laundering and counter-terrorist financing. However, the Wolfsberg guidelines are not binding for FIUs, and they do not specify the format or channel of information exchange between FIUs3. Moreover, submitting information in written form may not be the most efficient or secure way of communication, as it may cause delays, errors, or breaches of confidentiality.
Take no action until contacted by the other FIU. This option contradicts the principle of spontaneous information sharing, as it implies that the FIU with the relevant information will wait for a formal request from the other FIU, instead of proactively sharing the information. This may result in missed opportunities, inefficiencies, or failures in detecting or preventing money laundering or terrorist financing.
Request approval from the Egmont Group prior to sharing the information with the other FIU. This option is unnecessary and impractical, as the Egmont Group does not have the authority or the capacity to approve or deny individual information requests or exchanges between FIUs. The Egmont Group provides a platform and a framework for FIU cooperation, but it does not interfere with the operational autonomy or the bilateral relations of its members4.
References:
FATF Recommendation 40: Other Forms of International Co-operation
Egmont Group of Financial Intelligence Units Principles for Information Exchange Between Financial Intelligence Units Wolfsberg Group Egmont Group

the bank teller should not provide any information to the police officer without consulting the compliance officer first. The compliance officer is responsible for ensuring that the bank follows the applicable laws and regulations regarding customer privacy, data protection, and anti-money laundering. The compliance officer can verify the authenticity and validity of the request, determine the appropriate response, and obtain any necessary approvals or authorizations before releasing any information. The bank teller should not reject the request outright, as this could be seen as uncooperative or obstructive. The bank teller should also not provide the information after management approval, as this could bypass the compliance officer's role and expose the bank to legal or regulatory risks.
References:
Bank Records and Financial Privacy Laws - FindLaw1
Anti-Money Laundering (AML) Risk Assessment | ACAMS2
What is the Difference Between Smurfing and Structuring?3