True aged coffee is not the same as old coffee (though sometimes stale, old coffee is sold as aged coffee--buyer beware!). Real aged coffee is carefully aged, usually for six months to three years, by regularly monitoring and rotating the beans to distribute moisture and even out the aging process between coffee bags. This prevents mold and rot from occurring. Coffee is usually aged at origin, and is often aged at a higher altitude, where the temperature and humidity are more stable than at lower elevations