The passport belongs to the horse, not to whoever happens to own him, and it should already have travelled with him to your yard. What has to change is the keeper record held by the issuing organisation, and until that is updated the paperwork still names the previous owner — a mismatch that causes real friction the first time an official, a show secretary or a vet asks to see it.
Find Who Issued the Passport
Open the passport and look inside the front cover and the identification pages for the issuing organisation — a breed society or another approved passport issuer — along with the passport number and the horse's microchip number. Contact that organisation directly, because only the issuer can amend its own record. Ask whether it wants its own transfer form completed, what the fee is and where the passport should be sent, and check the horse's details on the identification pages against the animal standing in front of you: colour, markings, age and microchip number should all match before anything is posted anywhere.
Complete the Transfer and Send the Passport In
Fill in the transfer form with your full name and address exactly as you want them recorded, sign it, and send it with the passport and the fee to the issuer. Use a postal service with tracking, because the passport is the horse's identity document and a lost one means a slower, more expensive replacement process. The issuer updates its database and the passport's ownership section, then returns the passport to you. Timescales vary between organisations, so if you have a show, a sale or a journey coming up, start the transfer well before you need the document back in your hand.
Match the Microchip Record to the Passport
A passport in your name is only half the identity picture. The microchip number printed in the passport is held on a separate chip database, and that record needs your name and contact details too, because a found horse is traced through the chip, not through the passport in your filing cabinet. Contact the database the chip is registered with, give them the number and your details, and keep the confirmation with the passport. If the chip number in the horse differs from the one printed, raise it with the issuer before the transfer completes, not after.
What to Keep Together Once It Returns
When the passport comes back, check your name is recorded correctly and file your bill of sale behind it: the sale document proves the transaction, the passport proves the horse's identity and keeper history, and together they are the pair every future buyer, vet and official will want to see. Add the horse's vaccination record and any vet history the seller passed on, so the file tells the whole story from the day he arrived. If the seller gave you receipts for a deposit or part-payment along the way, file those behind the bill of sale as well.
That bundle is exactly what KinsLe's Pet Passport is designed to hold — the horse's records gathered in one portable packet — so the passport, sale receipt and history stay together instead of scattering across drawers and email accounts.