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ACH is a more cost-effective for churches to use and should be allowed for Event Registrations.
I believe the Core Team's historical position has been: "ACH is not real time and takes longer to settle. And there could be negative consequences and a lot of risk due to NSF (insufficient funds) and failed payments."
I think a good compromise would be enabling credit card only by default, with a setting to enable ACH. A church should be cognizant of the risk, but at least have the choice to proceed if they weigh the cost/benefit.
Using the new (Obsidian) version of the Event Registration block, if the tokenized payment gateway supports ACH then this should now be possible.
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