The real question: who can physically act on the authorisation
Emergency authorisation for a cat in a home with an elderly owner and a young energetic cat must answer more than permission. It must answer capability. The elderly owner may be entirely willing to help yet unable to lift a heavy carrier, drive at night, catch a frightened cat, or stand through a long clinic wait. So the document should name two layers: the owner as the person in charge day to day, and a named helper, such as a family member, neighbour, or friend, who has agreed in advance to be called for lifting, transport, and vet trips. Write both names and numbers in call order, in large print, and confirm the helper knows they are on the page before the stay begins, not as a surprise during an incident.
One page, plain words, kept where it will be found
Format is a safety feature in this household. One page, short sentences, no small print, with your cat's name, description, and microchip number at the top, your consent for the named people to arrange emergency veterinary examination and stabilising care during the stay, and the vet's and out-of-hours service's names, addresses, and numbers in bold sequence. State where the carrier is kept and that it stays accessible, not stored in a loft or garage. Note the agreed general arrangement for payment so nobody hesitates over cost at the clinic desk. Keep the printed page beside the phone or on the fridge, and give the helper their own copy to keep at home.
Scenarios this household should treat as urgent
Name the incidents this particular pairing of cats makes likely. The young resident cat's play can tip into a scuffle, so any bite, eye injury, limping, or sudden hiding by your cat after an encounter means prompt veterinary advice the same day. Add the always-urgent signs in plain language: not eating for a full day, repeated vomiting, straining in the litter tray, difficulty breathing, or a fall on stairs. Include an instruction written for the owner's protection as much as the cat's: if the cat is injured or distressed, do not chase, corner, or lift it alone; shut it in one room, call the helper, and let the helper handle capture and the carrier. That single line prevents the second emergency, a fall or a bite to the owner, that this scenario otherwise risks.
If the owner becomes unwell during the week
A complete authorisation for this home also covers the human contingency. If the elderly owner is taken ill or into hospital, your cat still needs feeding, tray care, and a safe pair of hands, so name the person who steps in for daily care as well as emergencies and say where a spare key is held. Ask that person, or the owner if able, to contact you the same day so you can arrange early collection if needed. State that the authorisation lasts for the stay period described in words, that it covers your cat only and not the young resident cat, whose arrangements remain the owner's own, and that urgent care to prevent suffering may proceed if neither you nor your second contact can be reached in time.
Rehearse it gently, then leave it alone
Go through the page together at handover without alarm: who is called first, who drives, which vet, where the carrier and the page live. Practise opening the carrier and show how your cat prefers to be guided in, so nobody's first attempt happens with an injured animal. Then let the week run on the ordinary routine, with the page quietly in place. With KinsLe Care Pass, the owner and the named helper both hold temporary access to your cat's authorisation details, routine, and contacts, so help does not depend on one person finding one sheet of paper.