The Fed specifically discussed the individual vs. lump-sum transfer question, in a Staff Opinion of July 13, 1992 (FRRS Locator 2-342.22), question #2. If separate transfers are made to cover individual checks, even if those checks are presented together, each transfer is counted separately. If, however, the checks are processed in a batch and only one transfer equal to the sum of the overdrafts is made from the savings account, only one transfer is counted. Posting checks in batches is sometimes referred to as "list posting."
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"I guess I should warn you, if I turn out to be particularly clear, you've probably misunderstood what I've said." -- Alan Greenspan