It could also be that Amazon waives it's same address policy only around Christmas as it knows that a) people are travelling and b) a missed Christmas present i

It could also be that Amazon waives it's same address policy only around Christmas as it knows that a) people are travelling and b) a missed Christmas present is a bigger deal than a normal missed package. It might have figured that this would be an acceptable loss given that it can only be exploited once a year.