1. Pet immunization certificate: A pet immunization certificate is a certificate issued by a veterinarian after a pet is vaccinated, with the pet immunization certificate number on it. You can consult a veterinarian or check your pet's immunization certificate.
2. Pet health file: If you have a pet health file, the immunization card number will also be recorded in the file. You can check the pet's health file and find the immunization certificate number.
3. Pet Hospital or Veterinary Clinic: If your pet has been immunized in a pet hospital or veterinary clinic, you can consult the relevant hospital or clinic, and they will provide the pet's immunization certificate number.