1. Create pledge reminders.
  2. On the General tab in the second Reminder type drop-down, select Per installment.
  3. Mark the Create output query checkbox. Select the type of query you wish to create.
  4. Select all other appropriate options for determining which pledge installments are due.
  5. Run the mailing. When prompted to record the mailing in each gift's reminder history, click No.
  6. On the Save Static Query screen, enter a name for the output query and click Save. The output query contains the constituents or gifts that have installments due as of the date entered in the Run date field.

OR

Run the Not Paid report