A prenote isn't subject to Regulation E at all because it's not a transaction to or from the consumer's account. That said, you should heed your customer's request that transactions from the Originator not be posted. I suggest you get a statement in writing from your customer that the transactions aren't to post. Then prepare to return each of the dollar transactions as unauthorized.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8