register unregistered puppy
https://thepuppypapersnews.ironwoodscope.com/posts/what-are-puppy-papers-and-why-they-matter-for-your-designer-breed
If your puppy wasn't registered with the local council or breed club at birth, you'll need to fill out the late registration form with proof of its date and parentage. Some places require a vet's age verification, so call ahead to avoid extra trips. It's a common process for newer pet owners.