Common KDP Mistakes and Rejections: Why Your Book Gets Flagged and How to Fix It (2026 Guide)
11 min read · Updated October 2026
Few things sink an author’s mood like an email from KDP saying your book cannot be published, or a warning on a title you thought was finished. The good news is that most rejections come from a small set of causes, and nearly all of them can be fixed and resubmitted. This guide walks through the problems authors hit most often: content and metadata issues, formatting and file errors, cover and trim problems, quality warnings, and rights questions. It also explains how to read the message you received, how to reply to KDP, and how to avoid the same problem next time. KDP’s rules change from time to time, so treat this as a practical map and always check the current content guidelines in your KDP dashboard before you act.
Why does KDP reject or flag a book?
KDP reviews every title before it goes live, and it can review it again afterwards. The review checks the content itself, the metadata (title, description, keywords, categories), the files you uploaded, and whether you hold the rights to publish. Some of this is automated and some is done by people, so a book can pass one check and trip another.
Most problems fall into a few groups: content that breaks the content guidelines, a title or description that misleads or does not match the book, files that look broken or unfinished, covers that do not meet print specs, and rights or originality concerns. Knowing which group your message belongs to saves a lot of guessing.
Read the email carefully before changing anything. KDP messages are often brief and generic, but they usually name the area of concern, such as content, metadata or the print file. Change only what the message points to, then resubmit, so you can tell what fixed it.
What content issues cause a rejection?
The content guidelines cover material KDP will not sell, such as illegal content, hateful content and material that exploits children. They also cover offensive or disturbing content and what the guidelines call poor customer experience. The exact wording and the grey areas are set by Amazon and can change, so read the current text rather than relying on memory or forum posts.
Public domain and low-content titles are a frequent source of trouble. A book that is mostly freely available text with little added value, or a notebook or journal that is near identical to many others, can be flagged. If you publish public domain material, add real value such as original annotations, an introduction or new translation, and be accurate about what it is.
Adult and sensitive material is allowed in many cases but has its own rules, including how it is categorised and how the cover and description present it. If your book contains mature themes, be honest in the metadata and consider adding a content note. The Content Warning Generator can help you word one for readers.
What metadata mistakes get books flagged?
Metadata is the title, subtitle, series, author name, description, keywords and categories. KDP expects these to describe the book accurately. Common mistakes include stuffing keywords into the title or subtitle, using another author’s name or a famous brand as a keyword, claiming bestseller status or awards you have not earned, and putting a price or promotion in the title.
The title and subtitle on the cover should match what you enter in the dashboard. A mismatch, or an author name that differs between the cover and the form, is a simple and common reason for a rejection. If you use a pen name, use it consistently in both places.
Descriptions should not contain links, requests for reviews, or claims you cannot support. Pick categories and keywords that truly fit, and keep to the number the dashboard allows. If you want help choosing them, the Amazon Category Finder and the KDP Keyword Generator are a reasonable place to start.
What file and formatting errors trigger quality warnings?
Quality warnings often point to the interior file. KDP may flag spelling errors, missing or broken text, odd spacing, images that are blurry, or a table of contents that does not work. A manuscript that looks unfinished, with placeholder text such as “Lorem ipsum” or “insert chapter here”, is an easy catch.
For paperbacks, margins are a classic problem. Text that sits too close to the trim edge or the gutter, or images that run off the page without bleed set up properly, will fail the print check. The Gutter Margin Calculator helps you work out safe inner margins for your page count.
The previewer in your dashboard is your best friend here. Open it on every pass and page through the whole book, not just the first chapters. For a full walk-through of getting files right, see the formatting guide, and proofread properly before you upload, because typos are a leading cause of quality notices.
What cover and trim size problems cause rejections?
Print covers must match the trim size, page count and paper type you chose, with correct bleed and a spine of the right width. If you change page count after designing the cover, the spine width changes too. The Book Spine Width Calculator gives you the figure to hand to your designer, and you should always confirm it against KDP’s own cover template.
Other cover problems include low resolution images, text placed in the bleed or too near the edge, a barcode area covered by artwork, and a cover that shows a different title or author name than the metadata. For ebooks, the cover image must meet the current size and quality requirements shown in the dashboard.
Do not use images you do not have the right to use. A stock photo licence that forbids use on book covers, or artwork copied from elsewhere, can lead to a takedown. Keep your licence records, and choose a trim size that suits your genre before the design begins.
What do rights, duplicate and AI disclosure notices mean?
KDP may ask you to confirm that you hold the rights to the book. That can happen if the text appears elsewhere, or if the title looks like a copy of another work. Keep evidence ready, such as your own drafts, a contract, or a licence. If you wrote the book yourself and published it elsewhere first, say so, and make sure any exclusivity terms, such as KDP Select, are respected.
Duplicate content notices usually mean the same or very similar text is already published under your account or another. Do not publish the same book twice in the same format. If you are making a new edition, update the existing title rather than creating a copy.
KDP has asked authors to say when content is AI-generated, as opposed to AI-assisted, when they publish. The exact definitions and requirements are set by Amazon and may change, so read the current wording in the dashboard. If you use AI tools, review and edit everything yourself. CruxOne, a browser-based AI publishing platform for indie authors, includes AI writing and editing, but you remain responsible for the accuracy and originality of what you publish.
How do you respond to a rejection and resubmit?
First, identify the type of message: a content or metadata issue, a file issue or a rights query. Fix exactly what is named, check the rest of the book for the same problem, and then save and resubmit. Resubmitting without changes usually produces the same result and wastes time.
If you honestly cannot see the problem, or you believe the decision is wrong, contact KDP support through the dashboard. Be polite, quote the message, state what you checked and changed, and ask which part of the guidelines applies. Keep it short and factual, and avoid arguing in the first message.
To prevent repeat issues, build a pre-flight checklist: matching cover and metadata, a clean proofread, previewer check, rights confirmed and categories chosen honestly. If you want a second pair of eyes, you can hire an editor or designer through a marketplace. CruxOne offers one for professionals, and it is worth the cost if you are stuck.
Frequently asked questions
How long does a KDP review take?
KDP states a typical review time in its dashboard, but it can vary. Check the current estimate there rather than relying on a fixed number.
Can I resubmit a rejected book?
Yes. Fix the issue named in the message, check for similar problems, and resubmit. Sending the same files unchanged usually gets the same result.
Why was my book flagged after it was already live?
KDP can review books again after publication, for example after a reader report or a policy change. Follow the instructions in the notice and fix the issue.
Do I have to disclose AI use to KDP?
KDP asks authors about AI-generated content when publishing. Definitions can change, so read the current wording in your dashboard and answer honestly.
Can I appeal a KDP decision?
You can contact KDP support through the dashboard, quote the message and explain what you changed. Keep it factual and polite.