Need advice on getting a puppy and changing the details on the microchip and kc registered papers...UK?

well u get the papers and the microchip papers when u buy the puppy, there should be a sheet for change of details with the microchip papers if not then there will be contact details on it on the bottom for u to ring up and they will send u a change of details form out i think it costs like a fiver to reregister the chip. thats what we did when we got our dog but i dunno about the kc papers sorry. hope i helped. x