After completing the registration process, the Australian National Kennel Council will provide a Breeder Registration Number and a Breeder Identification Number to every registered breeder in the country. When promoting the availability of their Cocker Spaniel puppies for sale, reputable breeders will always provide the BRN of their breeding dogs.
When you buy a puppy online, you need to have a formal contract that describes your puppy's health status. The terms concerning spaying or neutering the breeder should include the dog, the payment information, and shipping costs.
There should be a clause stipulating that the breeder will take the puppy back if, for example, the puppy has a serious health issue. Before you pay for the puppy and bring it into your family home, you and the breeder should have copies of this contract that have been notarised.