Here is the Milestone info.....
GUEST RECOGNITION - MILESTONE REWARDS PROGRAM
As part of Carnival’s Guest Recognition Program, Milestone Rewards was developed in appreciation of longtime Carnival guests. This milestone reward benefit is in addition to the wide range of amenities and privileges that guests already receive as part of the VIFP Club.
Milestone Rewards Program denotes a guest’s 25th, 50th 75th and 100th revenue cruise with Carnival. Guests will receive a special Milestone Sail & Sign card on their corresponding Milestone cruise. We want to distinguish guests on their Milestone sailing with a unique card so that we can make his/her Milestone experience extra special and memorable. After this milestone cruise, they will revert to the card that corresponds to their VIFP level.
In appreciation for their loyalty, the guest will also be granted the opportunity to redeem a future non-refundable onboard credit equivalent to 25%, 50% or 75% of the cruise ticket price, corresponding to the milestone reached. And when a guest reaches his/her 100th cruise, will qualify for a FREE Caribbean, Mexican Riviera, Alaska or Australia cruise of their choice (8 days or less, for 2 guests), in accommodations up to and including Ocean Suites (category OS/OT). This onboard credit may be applied to any future cruise in accordance with the terms and conditions below.
If you have questions regarding your Milestone rewards, please contact our Milestone's Desk at 877-CCL-VIPS. Terms and Conditions (in fine print on the bottom of the Milestone letter)
Milestone Reward is valid for its stated value in U.S. dollars, only on Carnival Cruise Line and/or Carnival Australia cruise booking, to be used as a credit on board a ship. The Milestone Reward is not valid on any other cruise line, including any Carnival Corporation affiliate line. Milestone Reward is nontransferable, nonrefundable and has no cash value.
Milestone Reward must be redeemed at least 30 days prior to sail date and will be applied to the booking on the week prior to sailing.
Only one Milestone Reward is redeemable per guest, per booking; more than one guest per booking may redeem a Milestone Reward.
Booking must be made within 18 months of the date stated on the letter from Carnival's Milestone Desk; there is no specific sailing window.