If your furry friend has reached the age of 20, you could be in line for a certificate.
Records suggest no dog has ever lived to that age in New Zealand, at least in the four years since the programme was established.
The scheme's starter, Michael Romanos, says there are simple ways to prove it.
"Veterinary records - every owner would have taken their dog to a vet; and then there are records kept by kennel clubs when puppies are registered."
Mr Romanos says reputable breeders will also keep records, which is another way to prove your pup's age.
The confirmed world's oldest dog according to Guinness World Records was an Australian cattle dog named Bluey, who died aged 29 in 1939. Other dog-year centenarians include Butch, a beagle who died in 2003, and Taffy, a Welsh collie.
Guinness only records 17 dogs as having lived to 20. In contrast, at least 40 cats have made it to 21, the oldest - a Tabby mix named Crème Puff - making it to 38.
In 2014 Auckland newspaper the Western Leader reported on a dog named Daisy Louise that was said to be 22, but it appears no proof was given.
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Mr Ramanos is sure there is an old Kiwi dog out there worthy of the award.
"I've yet to be able to present one of these lovely certificates because no one who has come forward can prove their dog is aged 20 or more."
The milestone age equates to 135 dog years, and he believes it's almost certain there's a worthy pup out there.
"We don't have the health issues that can affect dogs in other countries… New Zealand has the second-most dogs per capita in the world."
Get in touch with MrRomanos at firstname.lastname@example.org.