The NACHA Company Identification field has transitioned from being strictly numeric (e.g., EIN prefixed with "1") to allowing alphanumeric characters. This evolution provides greater flexibility for originators to use proprietary identifiers assigned by financial institutions. The shift, common since the early 2000s, reflects the broader adoption of ACH payments across various industries:
The NACHA
Company Identification
field has transitioned from being strictlynumeric
(e.g., EIN prefixed with "1") to allowingalphanumeric
characters. This evolution provides greater flexibility for originators to use proprietary identifiers assigned by financial institutions. The shift, common since the early 2000s, reflects the broader adoption of ACH payments across various industries: