My grandmother once sent a letter to my parents, where they lived at the time in Southland, a district of New Zealand. Unfortunately, Granny's writing was never the clearest, and the letter was directed ~20,000km out of its way to Scotland, despite having insufficient stamps. The posties in Scotland were unable to deliver it, unsurprisingly, but figured out the mistake and sent it ~20,000km back again, and it eventually reached my parents.