1. In Configuration, Attributes, create a new gift attribute named Reminded On with a data type of Date.
  2. When running pledge reminders, on the Attribute tab, mark Add, Update or Delete Attributes for each Record.
  3. The next time pledge reminders are run, choose to exclude gifts with the specific attribute and date on the Attributes tab.  At the same time, on the bottom half of the screen, choose to add the attribute of the reminded on date for this group of gifts. This cycle can continue so that the same gift is never reminded twice.