What is a rabies vaccine certificate?

A rabies vaccine certificate is the official document a veterinarian issues after administering a rabies vaccination to a dog or cat. It contains the pet's identifying information, the vaccine product name, the date of vaccination, the expiration date of immunity (typically one or three years depending on the vaccine used), and the veterinarian's license number and signature. This certificate serves as legal proof that the vaccination occurred.

Colorado law requires all dogs and cats within city limits to be vaccinated against rabies and to have a current certificate on file with the local animal control authority or municipal licensing office. The certificate is mandatory for registering your pet's license and is essential for travel across state lines. Without it, your pet cannot legally be licensed in Denver or most Colorado municipalities.

A rabies vaccine certificate differs from a rabies tag (the physical metal tag attached to a collar). The tag is simply an identifier showing that a pet is licensed; the certificate is the legal proof that the vaccination itself happened. The certificate must be presented to animal control, whereas the tag is worn by the pet. If your pet bites someone, animal control will request the original certificate to determine whether quarantine is necessary. You can obtain a certificate through any licensed veterinarian, including low-cost vaccine clinics in the Denver area.