We travelled to Jamaica a few years ago and discovered that my 18 year old son's passport had expired (2 years prior) as we were about to board the plane. He had already shown it to at least 3 people and no one picked up on it. When we got to immigration, we were told that the passport would have been good for up to 6 months after the expiration date. We were then detained while the authorities contacted the airline to have them write a letter saying that they would take responsibility. After about 2 hours, we were on our way to Negril but we stopped a few extra times for Red Stripes.