Actually Keith,the KC database won’t hold the dogs but the FCI will so it should never happen where dogs are missing on papers.
The globally well known dogs you talk of that aren’t on the papers aren’t very well known by the majority of people.
All the best
George
If you are referring to the 'Unknown Registered' dogs on the KC pedigree in the photo - sorry I disagree, it happens all the time and, like I said, is because of the limited KC database but also exacerbated because of terrible spelling mistakes on the database. I can give countless examples if required.



