How to prove you own your horse is explained here by solicitor, Rebecca Stojak.
In the UK, there isn't a single, approved document that proves ownership of your horse.
However, certain documents can go towards evidencing ownership in the eyes of the courts.
These include a purchase receipt, your historic bills from vets or farriers and old insurance documents.
In an ideal world, when you buy a horse, both parties should sign a contract.
This doesn't have to be long and should be drawn up ideally by a solicitor who specialises in equine law.
A simple contract shouldn't be too costly and can save a lot of heartache (and money) if things go wrong in the future.
Documentation, such as your horse's microchip paperwork and his passport, are evidence of your horse's identity, but don't prove that you own him.