Separation on a long drive rarely looks dramatic. It looks like a carrier set down at a busy stop while doors are held, a roadside handover to a kind stranger after a breakdown, or a cat slipped from an opened carrier door in an unfamiliar car park. In each case the person now holding your cat knows nothing about her, and the card taped to the carrier is the only voice she has. That card needs preparing at home, in calm conditions, with every field written to be useful to a stranger within one phone call.
The Card Set, Field by Field
The carrier card carries these fields: her name and description or photo, your mobile plus a second journey-aware contact, the vet's number, the microchip number, emergency conditions and medicines in generic terms, and feeding notes. Her name and description or photo come first because a finder needs to confirm the cat in the carrier matches the card on it, and a small printed photo solves the problem of describing a tabby over the phone. Your mobile plus a second journey-aware contact covers the obvious failure: you are driving, in a tunnel, or dealing with the emergency that caused the separation, so the second person should be someone who knows this journey, knows her, and can make decisions or relay messages until you are reachable.
The vet's number connects a finder or an emergency clinic to the practice that holds her history. The microchip number belongs on the card in full, because a scan yields the chip number only and the registry holds the contact record behind that number; writing the number out lets anyone compare a scan result against the card instantly, and lets a clinic quote it accurately when calling the registry. Emergency conditions and medicines in generic terms means the conditions a stranger would need to know about in the first hours and the medicines she takes, described generically and exactly as her vet paperwork describes them, so urgent care is not given blind. Feeding notes close the set: what she eats, roughly how much, when she was last fed, and anything she must not be given while she is out of your hands.
How the Card Is Fixed and Copied
Write or print the card large enough to read through carrier mesh in poor light, seal it against leaks and weather, and tape or tie it flat to the outside of the carrier where a handler will see it before opening the door. A duplicate card inside a sealed pouch within the carrier covers the day the outside card is torn away. Keep a phone copy of the same information on your own phone, photographed and saved where you can open it without a signal, because the copy is what you will read out to a clinic, a rescue or a search post while the carrier is somewhere else.
Settling Notes and Keeping the Card Current
Feeding notes deserve one addition that costs a single line: what settles her, described behaviourally. Note that she calms when the carrier is partly covered and voices stay quiet, or that she will eat only when left undisturbed in a parked car, rather than naming any product. A finder who knows how she settles is a finder who can keep her calm in a strange kitchen until you arrive. Check the card before every long drive, not once a year, because contact numbers, vet details and medicines change, and an out-of-date card recreates the very silence it exists to prevent. Those same fields live together in Pet Passport on KinsLe as a single records packet, so updating the packet updates the card you print from it.