Using Visual ID and DNA to Register Your Dog Without Official Papers
https://dogownernotes.alderbrief.com/posts/using-visual-id-and-dna-to-register-your-dog-without-official-papers
If you lost your dog's registration papers or never had them, you can still register your pet using visual identification and a DNA sample. Shelters and some local agencies now accept clear photos of unique markings, coat patterns, and a simple cheek swab to create a verified profile. This method works especially well for mixed-breed dogs or rescues without pedigree records. Just take good photos in natural light and follow the kit instructions for collecting the DNA sample properly.