A review found interior or cover content in your book that is also “available from a different publisher.” Reply with documentation confirming that you hold the rights. Within five days — or the title is made unavailable for sale.
What it does not mean
The five days
The window is short because it is a document request, not an investigation. Treat it as one.
Acknowledge the notice, name the title and its ASIN, and say the documentation is being assembled. Silence is what closes the window — an early reply keeps a human on the thread.
Font and image licences, stock receipts, the invoice from a freelancer or ghostwriter, the ISBN registration, your working files. Anything dated that a third party issued is worth more than anything you made.
Most complaints touch stock assets, clip art, public-domain text or a template. For licensed material the licence is the answer. For original material you need something showing it existed under your name first.
One line per item: what it is, where it came from, what date it carries. A reviewer working through a queue can act on a list. They cannot act on an explanation of how much the book means to you.
Reply on the existing thread; do not open a second case. Then witness the rest of your catalogue while this is fresh — the next complaint arrives with the same five days, and the evidence you are missing today is evidence you can have by tonight for the books nobody has reported yet.
This is what we have learned from authors who have been through it, and from building the evidence tooling. It is not legal advice, and we are not your lawyers. If a title matters commercially, talk to someone who is.
If you have nothing independent
Then you send what you do have, and you say plainly what it is. Plenty of cases resolve on licences and working files alone, and overstating what your evidence proves is the one move that can make things worse.
But be honest with yourself about the gap. A certificate issued today cannot prove anything about last year — and we would not sell you one pretending otherwise. What it can do is make sure the next title, and the ones already on sale that nobody has complained about yet, are never in this position.
Witness the rest of the catalogue tonight
Guard fingerprints your files, anchors the record into the Bitcoin blockchain, and gives you a certificate a reviewer can verify without going through you — or through us.