This is probably a meek attempt at demonstrating compliance with Anti-Money-Laundering (AML) laws and regulations. Lawyers will often suggest this sort of thing

This is probably a meek attempt at demonstrating compliance with Anti-Money-Laundering (AML) laws and regulations. Lawyers will often suggest this sort of thing, because the only cost is a slight inconvenience to the client, and it might suggest 'good faith' in the case of a prosecution or enforcement action.