A breeder who chips a litter before collection day has done the first half of the job. The chip sitting under her skin is only an implanted number, and a number on its own contacts nobody. The second half is the registration: an enrolment with a registry that links that number to a named keeper and a working phone number. The confirmation you are waiting for is the evidence that the second half happened, with her record standing in your name rather than the breeder's.
What the Confirmation Should Show
Written confirmation, by email or letter, should give you three things together. First, her full chip number, matching the number on any implant certificate or sticker sheet the breeder handed over. Second, the name of the registry that holds her enrolment, so you know exactly where her record lives. Third, confirmation that you are shown as her keeper, with the contact details the registry will use if she is ever found: check your name, your phone number, and your address character by character, because she will be returned according to what that record says, not according to what anyone intended it to say.
A document that confirms only the implant, such as a certificate recording that a chip was placed on a given date, is not the same thing. It proves she was chipped. It does not prove she is registered to you, and treating it as if it does leaves the most important step unverified.
How Soon It Should Arrive
Expect it within days of bringing her home. Breeders who register puppies in batches or complete the transfer as each puppy leaves may need a short processing window, and a few days is reasonable. Silence stretching towards a couple of weeks is not. She is at her most disoriented in exactly those early weeks, and at real risk of slipping a door or a garden gate, so the period when confirmation is missing is the period when you can least afford a record that still points to the breeder's house.
Put a date in your diary when you collect her. If the confirmation has not arrived by then, chase it while the litter paperwork is still on the breeder's desk and the details are easy for them to retrieve.
Verifying Her Record Yourself
You do not have to take the confirmation entirely on trust. Once you have her chip number and the registry name, you can check the enrolment from your side. A universal lookup using her number will identify which registry holds her record, which should match the name on the confirmation. With the registry itself, you can confirm that the record exists and that the keeper details are yours; registries commonly let the listed keeper view or verify the record through an account or by phone.
At her first vet visit, ask the practice to scan her and read the number back. That confirms the chip is present, readable, and the same number as the paperwork, closing the loop between the puppy in front of you and the record in the registry.
If the Confirmation Never Arrives
Chase the breeder first, in writing, asking for the chip number, the registry name, and the completed registration or transfer confirmation. If the breeder cannot produce it, work from her number: use a lookup to find the holding registry, then contact that registry with proof of keepership, such as your purchase paperwork and her vaccination record, and follow its transfer route so the record moves into your name. If the number was never registered at all, the registry can enrol it to you directly. Keep copies of everything you send and receive while you sort it out. Pet Passport in KinsLe files the breeder's confirmation with her first paperwork, ready whenever a clinic or kennel asks who her registered keeper is.