These are neither a token or a medal, but are sought by many collectors. Similar in nature to the license plate on an automobile, animal tags are an indication that a tax has been paid. Municipalities typically license dogs, and sometimes other animals, with license tags being issued annually. These tags are collected by location and year. They come in an interesting variety of shapes. There is currently no definitive reference work on the series. There is a national organization of collectors with a publication retained by the TAMS Library.