Over at the In The Weeds blog (which explores developments in cannabis law and business), Melissa T. Sanders writes about the recent publication by the Treasury Department’s Financial Crimes Enforcement Network of its “Marijuana Banking Update.”  In this publication, FinCEN summarizes the number of depository institutions providing banking services to marijuana-related businesses in the United States as reported by the filing of “suspicious activity reports” (SARs).  Marijuana-related businesses present myriad anti-money laundering compliance challenges, as well as complex federal tax issues as our colleague Jennifer E. Benda has addressed here, here, and here.