Rehoming paperwork has one job: the new family should be able to care for this dog on day one as well as you can on your last day with it, without guessing at anything that matters. That means the handover is a working history, not a small bundle of identity documents. Gather it before the move, walk through it with the new family in person where you can, and keep a copy of the signed agreement for yourself.
The Medical History, Complete
Pass on the complete history held by the dog's vets, in the clinic's own form rather than your summary of it: known conditions, past illnesses and surgeries, test results that shaped decisions, the vaccination record with its dates, and the name and contact details of the practice behind the file. A summary written by you is helpful, but it does not replace the clinic record, so arrange for the file itself to be shared or transferred to the new family's vet. Current medications need their own clear instructions rather than a line in a paragraph: what the medicine is, when it is given, how it is given, what it is for, and what the new family should do if a dose is missed or the dog seems unwell. Include parasite control and when it was last given, because that is the detail that quietly lapses during a move.
Food, Routine, Behaviour, and Triggers
Write down what the dog eats, how much, and when, plus the daily routine the dog is used to: walk times, toilet habits, where it sleeps, and how it settles. Then be specific about behaviour. Known triggers, fears, reactions to other dogs, children, visitors, traffic, or being left, and the things that reliably calm the dog, are worth more to a new family than any general description of temperament. Include training cues the dog knows and the words used for them, house rules it has lived by, and any incident history given plainly. A new family that knows the difficult parts in advance can manage them; one that discovers them alone may conclude the dog itself is the problem.
The Chip Transfer, Done With the Registry
The chip itself does not carry your contact details. A scan yields the chip number only; the registry holds the contact details linked to that number, which is why handing over a chip number or a registration certificate is not a transfer. The transfer has to be completed with the registry, following its own process, so the registry record ends up naming the new keeper, and a future scan reaches the new family rather than you. Do this as part of the handover, not as a promise for later, and confirm between you that it has gone through. Any collar tag with your number on it should also be replaced, since the old tag now points at the wrong household.
The Signed Agreement Between the Two Parties
Put the rehoming itself in writing and have both parties sign it. The agreement should identify the dog, name both parties, record the date of the transfer, and state anything the two of you have agreed about the move, such as a trial period, what happens if the placement fails, and any items or records included. It does not need legal dressing to be useful; it needs to be clear, specific, and kept by both sides. This signed transfer or rehoming agreement is the document that proves the change of keeper if a registry, vet, insurer, or authority ever asks how the dog came to be with its new family.
KinsLe supports the handover itself, because Transferrable Profiles passes the complete profile across while the registry transfer updates who the chip record names.