From reading about drug cartels, especially in Mexico, one thing I saw a few times was some variant of the following:

An international bank opens a new branch in Mexico City. After everyone is settled in, one day the manager of the bank has an appointment with a new client. The client enters and hands the manager photographs of the manager’s spouse and children, all taken an hour ago at school or home. They then make it clear the manager will be receiving lots of cash which will make his numbers look fantastic, but obviously if that cash is questioned, well, the manager does’t want to see what happens.

This seems like a difficult thing to deal with.