Good message from Dogslost in the UK. Good idea to have your vet scan the chip annually and check the chip database. From long experience in dog rescue work, I know how ofen people think their chip is registered, or that the vet or breeder registered it, when actually owners generally need to do this themselves. So often, pounds or rescues scan a chipped dog to find either no information at all associated with the chip, or it's out of date and the phone number is disconnected, or the chip goes to the breeder, who kept no records of who they sold the dog to and refuse to take it back 
. So even if you are sure the chip is registered, it's important to check that your current info is on file and correct.
. So even if you are sure the chip is registered, it's important to check that your current info is on file and correct.