The activity described in the question raises several red flags for money laundering, such as large and frequent cash deposits, transfers to offshore jurisdictions, and involvement of a charitable organization that could be a front for illicit funds. The Compliance Officer should file a suspicious transaction report (STR) with the competent authority, such as the Financial Intelligence Unit (FIU), as soon as possible, and provide all the relevant information and documentation to support the suspicion. Filing an STR is a legal obligation for financial institutions and does not require the consent or notification of the customer. The Compliance Officer should also follow the bank's internal policies and procedures for handling such cases, which may include freezing the account, conducting further investigation, or escalating the matter to senior management.
References:
ACAMS CAMS Certification Study Guide1, Chapter 4: Conducting or Supporting the Investigation, Section 4.4: Reporting, pp. 137-139 ACAMS CAMS Certification Video Training Course2, Module 4: Conducting or Supporting the Investigation, Lesson 4.4: Reporting ACAMS CAMS Certification Exam Outline3, Domain 4: Conducting or Supporting the Investigation, Task 4.4: File internal and external reports, p. 18

Explanation
The most concerning trading pattern for a compliance officer when a new customer has been onboarded in a securities firm is the customer accumulating securities of a low volume counter in small increments on a weekly basis. This type of behavior could indicate that the customer is attempting to obscure their identity or the true purpose of their trading activity, which can be indicative of money laundering or other suspicious activity. (CAMS Manual, 6th Edition, Page 170).

According to the Egmont Group of Financial Intelligence Units, which is a global network of FIUs that promotes information exchange and cooperation, FIUs making requests to another FIU should disclose the reason and purpose for the request, and provide feedback on how the information was used12. These actions are intended to enhance mutual trust, transparency, and accountability between FIUs, and to facilitate the effective use of financial intelligence and information for combating money laundering, terrorist financing, and other financial crimes12. FIUs making requests should also respect the confidentiality and data protection requirements of the FIU receiving the request, and avoid imposing unreasonable or unduly restrictive conditions12.
FIUs making requests should not send the same request to all FIUs, as this would be inefficient, unnecessary, and potentially harmful. FIUs should only send requests to FIUs that are relevant and competent to provide the information they need, based on the nature and scope of the case12. Sending the same request to all FIUs could overload the system, create duplication, and compromise the security and confidentiality of the information12. FIUs making requests should also make best efforts to provide complete and factual information, but this is not an action they should take when submitting a request, but rather when responding to a request from another FIU12.
References:
* Egmont Group of Financial Intelligence Units Operational Guidance for FIU Activities and the
* Exchange of Information
* Principles for Information Exchange Between Financial Intelligence Units