The primary purposes of Financial Action Task Force (FATF)-Style Regional Bodies are to promote effective implementation of FATF recommendations and to provide expertise and input in FATF policy-making.
(CAMS Manual, 6th Edition, Page 180)

If a financial institution wishes to close an account due to concerns about potential money laundering or other financial crimes, it is generally required to file a suspicious activity report (SAR) with the appropriate government agency. However, there may be instances where the government requires the account to remain open for ongoing investigation purposes.
In such cases, the government must provide a written request under proper letterhead and authority to keep the account open. This document will serve as legal justification for the financial institution to maintain the account, even though it may pose a higher risk for money laundering or other financial crimes.

https://egmontgroup.org/en/content/about
"The Egmont Group is a united body of 165 Financial Intelligence Units (FIUs). The Egmont Group provides a platform for the secure exchange of expertise and financial intelligence to combat money laundering and terrorist financing (ML/TF). This is especially relevant as FIUs are uniquely positioned to cooperate and support national and international efforts to counter terrorist financing and are the trusted gateway for sharing financial information domestically and internationally in accordance with global Anti Money Laundering and Counter Financing of Terrorism (AML/CFT) standards.

According to the Anti-Money Laundering Specialist (the 6th edition) resources, one of the red flags for money laundering in real estate transactions is the use of an appraiser who is not on the approved list of the financial institution. This could indicate a possible collusion between the appraiser and the borrower or the underwriter to inflate the value of the property and obtain a higher loan amount. The anti-money laundering specialist should document the underwriter's actions and the reasons for approving the exception, as well as the discrepancy between the appraised value and the market value of the property. The specialist should then file a suspicious transaction report (STR) to the relevant authorities, as required by the local regulations .
References:
ACAMS Study Guide for the Certified Anti-Money Laundering Specialist (the 6th edition), Chapter 7: Money Laundering Risks and Methods, page 201.
ACAMS Study Guide for the Certified Anti-Money Laundering Specialist (the 6th edition), Chapter 8:
Anti-Money Laundering Programs, page 227.
ACAMS Study Guide for the Certified Anti-Money Laundering Specialist (the 6th edition), Chapter 9:
Conducting or Supporting the Investigation Process, page 255.

A personal banking customer who simultaneously opens several accounts with almost identical names will most likely cause further inquiry, as this could indicate an attempt to evade transaction monitoring, reporting, or identification requirements. For example, a customer could open accounts with slight variations of their name, such as John Smith, Jon Smith, J. Smith, or John Smyth, to avoid detection or aggregation of their transactions. This could also be a sign of identity theft, fraud, or money muling. Therefore, the bank should verify the customer's identity and the purpose of the accounts, and monitor the activity for any suspicious patterns or behaviors.
References:
* ACAMS CAMS Certification Study Guide, 6th Edition, Chapter 4, Section 4.2.2, p. 1051
* ACAMS CAMS Certification Exam Outline, 6th Edition, Domain 2, Task 2.1, p. 52
* FATF Guidance on the Risk-Based Approach for the Banking Sector, October 2014, p. 353