On June 13th, the Financial Crimes Enforcement Network and the Internal Revenue Service announced they have updated the validation of zip code fields to cover city, state, and zip code. The validation has been enhanced to verify that the city and state are consistent with the first five digits of a U.S. zip code as assigned by the U.S. Postal Service. This is a change from the previous cross-validation of state and the first three digits of the U.S. zip code. The accuracy of the zip code field is particularly important to law enforcement agencies as many query based on their geographic location. This validation is being applied to all BSA E-Filing and paper submissions. FinCEN Notice.