Wirelessly posted (BlackBerry8703e/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104)

One other thing to note: Although credit-card LDW coverage should become primary if the renter has no other coverage, some credit-card issuers take the position that use of a free-day or dollars-off coupon voids the credit-card coverage since you are no longer charging the "entire" rental to the card. So whenever I use such a coupon on a rental, I always charge the rental to my World MasterCard, whose terms specifically allow you to use such a coupon without voiding the LDW coverage, as long as at least one day's rental charges are charged to the card.