An emergency contact list is a distance document: almost every entry on it was chosen because that person or clinic was close to the old home. Move house and the list quietly stops working, even though it still looks complete. Rebuild it around the new address in the first week, while you are updating everything else, and treat any entry you have not re-checked as out of date.
The Address and Clinic Entries That Must Change
Put the new home address at the top of the list, written exactly as a driver or a sitter would need it, including flat, unit, or entry details. Then find the emergency care that actually serves the new area. Your regular vet may change if the move is far, but the critical entry is the out-of-hours emergency clinic nearest the new home: record its name, full address, phone number, and opening pattern, and drive the route once in daylight so a stressful night journey is not also an unfamiliar one. If your old vet is staying your regular vet, keep that number too and mark clearly which clinic is for routine care and which is for nights and weekends, because under pressure nobody should have to guess.
The People Entries That Must Change
Your own mobile number only changes if you change it, so check it digit by digit rather than assuming. The bigger gap is local help. The neighbor at the old address who held a spare key can no longer reach your cat in minutes, so recruit the equivalent at the new home: a nearby neighbor, a friend in the same part of town, or a local sitter, with their mobile number and a note of whether they hold a key or know where one is kept. Add your landlord or building manager if you rent, since they can grant access when nobody else can get in. Keep one out-of-area family contact as the backstop who can make decisions and pay if you are unreachable, and tell every person on the new list that they are on it.
The list should also carry the practical details a contact would need in the first minutes of helping: where the carrier lives, where food and any daily medicine are kept, and the door or alarm code a neighbor needs to actually get in. A phone number without access is only half an entry. Note your cat's name, age, and any condition a vet should know immediately, such as a heart problem or a drug allergy recorded by your practice, so a contact ringing the emergency clinic is not relying on memory. If your cat is nervous with strangers, say so on the list, because the person collecting her should expect hiding rather than a cat waiting at the door.
Checking, Sharing, and Retiring the Old List
Call or message every number on the rebuilt list once. Wrong digits, changed numbers, and a clinic that has moved premises are common, and finding out during a calm test beats finding out beside an injured cat. Share the new list with your sitter, your local contact, and anyone who feeds your cat when you travel, and put a copy where a helper would look, such as on the fridge or with the carrier and food. Then delete the old list everywhere it lived, including old phone notes and printed copies, so nobody works from stale details in a hurry. If your cat is microchipped, update the registry address and phone separately, because the contact list and the chip record are two different things and both need the new details. Keeping the finished list inside your cat's KinsLe Pet Passport means the contacts travel with her vaccination and health records whenever a vet, sitter, or boarder needs the whole picture at once.