Cat registration in the Official Book of Feline Origins (or Loof) is a Holy Grail for those who wish to promote their purebred cat. Registering a cat with Loof is a process that requires meeting many criteria and having a little patience.

Chartreux, Siamese or Maine coon are very popular cat breeds which appear in the Loof. If the animal has been declared Loof compliant, it will receive an identification number. With this number, it is possible to check the pedigree of the animal in a few clicks.