+=item nacha_sec_code
+
+NACHA SEC Code for US ACH transactions. 'PPD' indicates customer signed a form
+giving authorization for the charge, 'CCD' same for a business checking/savings
+account, 'WEB' for online transactions where a box was checked authorizing the
+charge, and 'TEL' for authorization via recorded phone call (NACHA script
+required).
+