So that I can be identified in the future, my tin-opener let register me by TASSO.
TASSO is a central domestic animal register,
to which all domestic animals can be announced by their owners free of charge.
They get then a passport with the description of the animal
and octagonal aluminum a mark with the personal registration number of the animal,
which is located also in the passport.
The mark is hung on collar.
If the animal gets lost once and is found finally by other humans,
then these can call the telephone number of TASSO, which is written on the mark.
There one recognizes the animal on the basis of the in-punched number
and informs the owner,
so that he can fetch it fast again.
Stupid way I lost it together with that collar.