In the UK, the Control of Dogs Order 1992 states that any dog in a public place must wear a collar with the name and address (including postcode) of the owner engraved or written on it, or engraved on a tag. Your telephone number is optional (but we would recommend this).
You can be fined up to £5,000 if your dog does not wear an identification tag
You do not have to put your dogs name on the tag, this is optional. Unfortunately dog theft is a real danger and if the thief knows the name of your dog this may help them pass on the dog to the unsuspecting new owners because it appears they know the dog because the dog responds to their name. We would therefore recommend, you do not put your dogs name on the tag.
An example of the information to put on a dog tag is:
Mr A Smtih
No 54, BH17 7TD
Mr A Smtih
No 54 Letsbe Avenue
All dogs in Wales by 2015 and all dogs in England by 2016 must be microchipped.
For free microchipping see the Dogs Trust website
For a very visible permeant way of Identifying your dog consider an ear tattoo. If your dog is ever found they may only be a phone call away from you: http://www.dog-register.co.uk