I'm not sure if they do or not, it might be a good idea however just so other people know that you are a resposible pet owner. I know here that we get a new rabies tag every time the dog gets their rabies shot but then my vet clinic puts some info on the tags that people can use to reunite me with my dogs if they ever get loose...this year they started entering the tag #'s in a computer system that all the vets in the city can access. So I think of the rabies tags as an extra id tag to go along with their licenses and regular id tags.