how to register a litter
https://mydesignerdoglittershop.ironwoodscope.com/posts/why-designer-dog-litter-registration-matters-for-breeders-and-buyers
To register a litter, you usually need to contact your national or regional kennel club or breed association, providing details about the sire and dam, their registration numbers, and the date of birth. Many require a litter registration form along with a fee, and some ask for a vet’s confirmation of health checks. Processing times vary, so give yourself a few weeks before the pups need their own papers.