A transaction can only be canceled while in the CAPTURE_PENDING state. You can no longer cancel a transaction after the ACH capture process has begun. This Endpoint is Sunsetting and you should use the stable endpoint. Sunsetting APIs that are still supported but scheduled for deprecation.
Documentation Index
Fetch the complete documentation index at: https://docs.ach.netevia.com/llms.txt
Use this file to discover all available pages before exploring further.