Sorry GP, but you are incorrect. If a reversing entry is done correctly, the RDFI must comply with the reversal request. You can find information pertaining to this on page OR8 of the NACHA rules. There are time limits to make this happen (midnight of 5th business date following original erroneous entry). So to answer your questions"
1) yes, if they meet the required time limits and 3 other provisions
2) yes, they must notify the receiver of the entry
3) midnight on 5th day from original entry settlement date
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