The automated clearing house (ACH) is a system for financial electronic transfer. The ACH bank and branch code guide is a list of account and information codes financial institutions use to perform transfer tasks.

Basics

The ACH network is a collection of financial institutions. Each of these institutions use codes to electronically transfer money between receivers and originators. The ACH bank and branch code guide has a list of these acronyms, bank and branch codes.

Account Numbers

There are several kinds of account numbers in the ACH bank and branch code guide. Some banks can be originator or receivers, they can send or receive money using certain ACH transaction numbers. The first three numbers in many of the ACH codes direct money to particular branches. Appendix A of the ACH bank and branch code guide may have several branch code locations for a given bank.

ODFI and RDFI

A bank that wants to send funds electronically must identify themselves to ACH as the originating depository financial institution (ODFI). ACH then sends the account, bank and branch codes to the receiving depository financial institution (RFDI). The RDFI then gives the money to a receiver.