The dog license tag might be one of several dog tags worn.
A dog licence (or dog license) is required in some jurisdictions to be the keeper of a dog. Usually a dog-licence identifying number is issued to the owner, along with a dog tag bearing the identifier and a contact number for the registering organization. If a stray pet is found with the tag, a rescuer can call the registering organization to get current contact information for the dog's owner.
Licencing a dog might require additional actions on the owner's part, such as ensuring that the dog has a current rabiesvaccination. Licences typically must be renewed annually or after some small number of years.
Dog licensing was abolished in 1987. Prior to this, dog licences were mandatory, but the requirement was widely ignored, with only about half of owners having one. The final rate for a dog licence was 37 pence. This fee was reduced from 37½p when the halfpenny was withdrawn in 1984. This odd figure was itself a conversion from 7/6 (seven shillings and sixpence) on decimalisation in 1971. The revenue went to local authorities.
Dog ownership is regulated by a "dog tax" as opposed to a dog licence, with the amount due depending on the breed of the dog: dogs deemed "dangerous" (such as Rottweilers) are subject to higher taxation. Aside from the fiscal impl of dogs in a particular area.
Most states, municipalities, or other jurisdictions require dog licences along with rabies vaccination, and the licence duration cannot exceed the time the vaccine is effective. As a way of preventing the overpopulation of animals, some jurisdictions will charge a significantly lower licencing fee, if the owner presents veterinary proof that their pet has been spayed or neutered.