I found it very useful to have a record of a constituent's credit card transactions - both successful and those that failed - in the constituent's record. Only the last 4 digits are displayed in order to identify the card, but it did include amount, date/time information and whether it ran or failed. I had this information available in a previous database and was very disapointed to discover RE did not have this information integrated into their system, especially since we are using BBMS.