We received vouchers (four figures) from our cruise last summer (Homelands+Baltic due to a change in itinerary) , and applied them to a cruise we booked after we returned home. Today the new cruise was listed at $3000 less per person, so I called to rebook at the lower fare, knowing there would be a penalty involved. Little did I know that the voucher we got last summer could not be transferred to a “new” cruise! Use it, but once you apply it to a cruise, it can’t be transferred, even to the same cruise….I learn something new every day regarding Viking.