GUEST, You could try contacting ths GCCF and ask them for their advice. Also, there may be a GCCF judge of British Blues in your area who will advise you, and may want to know all about this woman! I would say that, as the cat isn't registered with GCCF it's no good as breeding stock for showing etc as copies of full pedigree charts have usually to be issued with kittens or when at stud. I would say that this person has no rights over your decision to neuter or not, nor of your right to breed from your cat, as no contract was entered into and nothing was signed. She doesn't even have proof that you bought the cat from her in a cash sale. But if you DO decide to breed, your kittens will have a limited sale value as they're not registered, neither will they have a Pedigree cert. I used to show British blue cats and have always had pedigree stock reg with GCCF. I now have Siamese, again from reg breeders. You may find that your cat has another breed in its genes (quite common, as 'breeding out' is a recognised practice) If a British Blue, she may have British Black in her, and her kittens may be a mixture. (Quite above board) I would say, it's well worth the extra cost to obtain a GCCF reg kitten from a reputable and official breeder, with all documentation handed over at purchase. I've often had to sign to say I will not breed from my kitten, but this has been under legal and professional conditions at point of sale. I envy you your little Blue, British cats are super!