A family change — a marriage, a divorce, a name taken or set aside — leaves a quiet paper trail through a dog's records. Her early vet visits sit under one surname, her recent ones under another, the microchip registration may carry either, and her insurance could be in a third variation if a form was filled in hastily. The dog has not changed; the filing has fractured. The remedy is to stop organising around surnames at all and rebuild the system around the one constant in every document: the dog herself.
Lead with the dog, then the document, never the surname
Relabel every folder and file so the dog's name comes first, followed by the document type and the source — her name, then vaccination record, then the clinic — with no surname anywhere in the label. This works under any future change as well, because it never depended on the household's name in the first place. Keep one physical folder per dog with the same structure inside: identity and registration first, health records behind, ownership and insurance at the back. For digital copies, mirror the same names exactly, so a search on paper and a search on a screen follow the same logic. If another pet joins the household later, the system extends by adding a folder under that animal's name instead of disturbing hers. Resist renaming the older documents themselves while you do this; a certificate is a historical record, and part of its value lies in showing exactly which name was in use when it was issued.
The cross-reference sheet that joins the two halves
At the front of her folder, place a single sheet that does the joining work: both surnames listed, which groups of documents carry each one, and one plain line explaining the change. This sheet is what saves a future search. A family member looking for the older paperwork, a new clinic reconciling a transferred history, or you yourself, long from now, will all start from a name that appears on only half the documents — the cross-reference tells them immediately that both halves belong to the same dog and where each half sits. Include her microchip number on the sheet as well, since that number is the identifier every system shares regardless of which surname a given database holds.
Updating the records that other people keep
Your folders are only half the picture, because the clinic, the microchip registry, and the insurer each hold her details under whichever name they were given. Contact each one and ask for the owner name to be updated, keeping a note of when you asked and what the record now shows — some will keep the former name visible as an alias, which is fine, as long as the current name leads. Bring the cross-reference sheet to the first appointment after the change so staff can merge anything filed under the old name instead of starting a duplicate record. In KinsLe, holding her documents together in her Pet Passport under her own profile sidesteps the surname split entirely, since the packet is organised around her identity from the start.