ACH vs eChecks

ACH means Automated Clearing House, which is a process used to move funds from one bank to another electronically. An eChecks is a short form of the term “electronic check”. These checks are now used to replace the traditionals paper checks. Read more about the difference Between ACH and eCheck.
https://ncrmerchantservices.com/ach-vs-echeck-whats-the-difference/