From 31st March 2016 it became law that all dogs in the Republic of Ireland must be microchipped and registered with an approved database. Puppies must be microchipped and registered by the time they are 12 weeks of age. It is illegal to buy or take ownership of a pup or dog that is not microchipped and registered. If you purchase, sell or take ownership of a dog or pup it is your responsibility to update the ownership details with the database. ID and proof of address is required when making an appointment to have your dog microchipped.