If Amazon was dropping the last digit from the routing number the ACH credit transaction attempt would have never made it to the destination bank. The fact tha

If Amazon was dropping the last digit from the routing number the ACH credit transaction attempt would have never made it to the destination bank. The fact that the destination bank was able to tell a digit was missing indicates the routing number was correct. A transaction with an 8 digit routing number would have never have left the OFDI because routing numbers are 9 digits.