When you have catmail?
The following video is from Fuji TV, starring a cat in the Kumamoto Prefecture of Japan.

According to the report, Tama the cat was born at one house, enjoyed his life there and was very happy.
Suddenly one day, Tama disappeared, leaving his owner upset.
Two years later, Tama returned to his original owner’s home in good health.
Suspecting someone else must be caring for Tama, she devised a wonderful plan and attached a letter to Tama’s collar. In the letter she was seeking the person who had been caring for him.
Tama’s second owners, who named him Azukichi, sent a reply in the same manner.
Tama’s second home was only 200 meters away, and now both of his owners exchange letters, via cat post, on a regular basis.
According to the report, Tama usually takes an hour or so to deliver, however he has been known to take as much as half a day to deliver his post.

Notice though, the guy with the missing finger, it just screams YAKUUUUUUUZZZZZAAAAAAA!!!!!