ACH Network Business Day Nacha Operating Rules 
PYMNTS
MAY 10, 2019
13, 2018, NACHA , the rules and standards body for the ACH network, announced that its voting members had approved amendments to the NACHA Operating Rules & Guidelines to establish a third Same Day ACH processing and settlement window,” the Federal Reserve wrote in the announcement.
Payment Savvy
NOVEMBER 10, 2022
Before diving deeper into SEC codes, let’s take a minute to better understand ACH transactions – if you’ve already worked with ACH transactions and have an idea about what is involved in them, you can skip this section and go straight to SEC codes. Using the wrong SEC code can also result in an ACH return.
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