Which guideline is considered the least important when opening an account for a new customer under the company's AML program?

The guideline regarding knowing the client's highest level of education is considered the least important when opening an account for a new customer under an Anti-Money Laundering (AML) program. While understanding a client's background can provide context in some scenarios, it does not directly pertain to assessing risk or detecting illicit activities associated with money laundering.

On the other hand, being aware of unusual transactions, identifying ownership of accounts, and identifying the source of funds are all critical components of an effective AML program. These measures are designed to ensure that institutions can monitor for suspicious activity and understand who is controlling and benefiting from the accounts they manage. By focusing on ownership and sources of funds, institutions can uncover potential risks and adhere to legal requirements for reporting suspicious activities.