How to Use Client Stories and Case Studies in a Book (Without Breaking Confidentiality)

The best story in your book is probably one the client never agreed to be in. It is the engagement where everything went wrong in month three and you found the fix. It also has a real company and a real person at its centre.

Most advice on client stories is about craft, and our main-site guide on using client stories in a business book covers that. This article covers what decides whether the story can appear at all, and then how a case study becomes a chapter.

Give every story one of three treatments, on purpose

Trouble starts when a story drifts between categories: half-disguised, never cleared, a real result attached to a blurred client. Decide each story’s treatment before you draft it.

Treatment	When it is honest	When it is not	What you need
Named, with permission	The client agreed in writing to this passage, in this book, with this result.	Consent was verbal, years old or given for a different use, such as a website testimonial.	A written reply approving the exact passage, logged with the date.
Anonymised	Nobody who knows the client could work out who it is, and the facts that carry the lesson are unchanged.	Only the name changed, or the disguise altered the facts that make the point.	The recognition test below, plus permission anyway if the client would recognise themselves.
Labelled composite	It blends real events from several clients to show a pattern, and the reader is told.	It is presented as one client, carries a specific number, or is reused as a testimonial.	An author’s note, and a phrase in the text such as “a composite of several clients”.

Our view: named stories are the strongest evidence a book can offer, so ask for them first. Composites are for showing what typically happens, never for proving that your method works. If a story only persuades because of a specific percentage, it has to be a real, cleared story or it has to go.

Anonymisation is a recognition test, not a name change

Changing “Sarah at Harbour Logistics” to “Jane at a logistics firm” protects almost nobody. Your likeliest readers include the client’s team, board and competitors, and they recognise situations, not names.

Work through four layers, and change or remove what the lesson does not need:

1. Identity: names, job titles, gender where it is irrelevant.
2. Organisation: industry, headcount, revenue band, location, ownership structure.
3. Time: dates, the year, and above all any link to a public event (a merger, a recall, a named funding round, a press story).
4. Distinctive details: the odd specific that makes the story vivid, such as the CEO who ran board meetings standing up. Colleagues identify clients by exactly these.

Then ask the single question that matters: could the client or their colleagues recognise it? If the answer is “possibly”, treat the story as identifiable and get permission, disguise or no disguise.

A hypothetical before and after. Draft: “A 340-person, family-owned food distributor in Leeds, six months after its 2022 warehouse fire, asked me to fix procurement.” Disguised: “A family-owned distribution business with a few hundred staff, recovering from an operational crisis, asked me to look at how it bought.” The decision that follows, the order of events and the rough scale of the savings stay true. Disguise the client; do not disguise what happened.

What the coaching and consulting codes already require

Coaches who hold an ICF credential or membership are bound by the ICF Code of Ethics, in effect since 1 April 2025. It defines confidentiality as “the protection of any information obtained in or around the coaching relationship”, with exceptions only for legal requirements, a threat of harm, or the client’s written consent. Standard 2.1 asks for “the strictest level of confidentiality with all parties involved”, which includes sponsors who paid for the coaching. Standard 5.2 requires statements about what you offer to be “true and accurate”, which reaches any result you describe in a book. Our sibling guide on writing a book as a business coach has a short table sorting session material by risk.

Consultants have a parallel text. The IMC USA Code of Ethics, approved in 2005 and reaffirmed in 2018 according to the institute’s page as of November 2026, opens Article 5.0 with “I will treat appropriately all confidential client information that is not public knowledge”, and bars using proprietary or privileged client information without the client’s consent. Article 14.0 adds: “I will not advertise my services in a deceptive manner”. A book you use to win clients is close enough to an advert that we would hold it to that line. If you belong to neither body, the codes do not bind you, but we would still treat them as the floor.

The law sits underneath the codes and is usually looser. In the US, the Digital Media Law Project’s guide to publication of private facts says the claim needs private, non-newsworthy facts whose disclosure would be highly offensive to a reasonable person, and that “consent is a complete defense”. The guide is archived (the project ran from 2007 to 2014) and law varies by state and country, so treat it as background. Written consent covers you under the codes and the law at once.

Read the contract before you ask the client

Your engagement letter may decide the question before the client can.

A real example: a consulting agreement filed with the SEC as an exhibit by Focus Universal, Inc. (effective 15 March 2019) says the consultant “will not directly or indirectly disclose to anyone the existence of this Agreement” without the company’s prior written approval, and its confidentiality duties apply “during or subsequent to the term of this Agreement”. Under a clause like that, you cannot even say you worked with the company.

If any answer is unclear and the story matters to the book, pay a lawyer for an hour. Nothing in this article is legal advice.

A permission request you can copy

Ask before you draft the full story, then send the finished passage for approval. Bernoff notes in his guide on how to write a book chapter that case studies “have the longest lead time” because people need time to agree to be profiled, so send the first requests in the week you finish the chapter plan.

Adapt it freely. It is a starting point, not legal advice.

Subject: May I include our work together in my book?

Hi [Name],

I'm writing a book about [topic], planned for publication around
[month and year]. One chapter is about [the principle], and our work
on [one-line description] is the clearest example I have.

I'd like to include the passage below. Three things first:

1. You can say no, and nothing changes between us.
2. [Either] I have not used your name or [company]'s name, and I have
   changed [industry / size / location / dates].
   [Or] I would like to name you and [company], if you're happy to be named.
3. You can ask me to change or remove any detail.

The passage would appear in the print book, ebook and audiobook,
including later editions, and short extracts may appear in my book
marketing. I will not use it as a testimonial for my services
without asking you separately.

[Optional, only if true] I drafted the book with AI-assisted software.
I did not upload our session notes or recordings to any AI tool.

[If a sponsor paid for the work] I will also ask [sponsor contact]
at [organisation] for approval.

--- PASSAGE ---
[Paste the exact text, including any result or figure]
--- END ---

If you're happy, please reply "I agree to this passage being used as
described" and, if you're named, tell me how your name and title should
appear. If you'd like changes, mark them up and I'll send the revised
version for approval. If the passage changes materially before
publication, I'll ask you again. You can withdraw until [date the
manuscript goes to print]; after that, a change would need a new edition.

Thank you,
[Your name]

Keep a story log: client, passage version, date sent, reply and treatment. If an editor later changes the passage materially, send it again.

Never let AI supply a “client story”

Ask a general chatbot for “a client example of this principle” and it will give you one: plausible, specific and invented. In a book that sells your coaching or consulting, that is a fabricated case study with your name on the cover, and former clients are exactly the readers who would notice.

It gets worse if the story migrates to your sales page. In the US, the FTC’s rule at 16 CFR 465.2 prohibits creating testimonials that materially misrepresent “that the reviewer or testimonialist exists” or their experience, and the endorsement guide at 16 CFR 255.2 says a story about one customer’s results will likely be read as “representative of what consumers will generally achieve” unless you disclose what is typical.

Use AI only where you supply the facts: drafting from your anonymised notes, tightening a passage. Strip names, firms and figures first, for the reasons in protecting your original ideas when writing with AI. Prevention habits, such as leaving a marked placeholder where a story should go, are in how to stop AI inventing facts in your book.

Guided software can enforce some of this. WritebookAI is one option: it analyses the PDF, Word or text files you upload, shows what they cover and miss, and its verification interview asks about gaps. When a chapter needs something your material lacks, such as a client result, it leaves it out and asks you instead of inventing it, and you approve every chapter. It does not get consent for you or judge whether your disguise is good enough. Anonymise before you upload, read its privacy policy first, and see the WritebookAI homepage for what is free to start.

From case study to chapter: five beats and where they sit

A client engagement is six months of meetings, a deck and a report, not a chapter. Amy Isaman’s guest post on Jane Friedman’s site, Beyond Story, draws a useful line: a case study “provides clear evidence to support the author’s argument”, and an opening anecdote the chapter never returns to is “a hook, not a case study”. So write the chapter’s principle in one sentence, cut the engagement down to the one decision that proves it, and build the case from five beats.

Beat	What it covers	Usual source in your files	Strip or check
Situation	Who, what was at stake, what they had already tried	Proposal, kickoff notes	Identifiers from the four layers above
Tension	Why the obvious fix would fail, and what it cost to wait	Diagnostic findings, interview notes	Private quotes and internal politics the lesson does not need
Decision	The choice the client made with your help, and the hard part	Steering group deck, your own notes	Your role: guide, not hero
Result	What changed, by how much, over what time	Final report, follow-up data	Every number needs a document and the client’s consent
Lesson	What the reader should take from it, and its limits	Your own reflection	Keep it to two or three sentences

Placement matters as much as the beats. Our default: open with situation and tension, stop before the decision, teach the principle, then return for the decision and result, and close with the lesson. The reader waits for the answer through the teaching section. The rest of the chapter’s anatomy is in our guide on how to write a business book chapter.

Take a hypothetical consultant. Her nine-month procurement project, cleared with the client, yields the anchor story for three chapters: the diagnosis (chapter two), the supplier negotiation (chapter four) and the six-month review where a third of the savings had leaked away (chapter seven). One permission request covers three chapters, and the failure in chapter seven makes the success in chapter four believable.

On results, our rule is blunt. For each figure, you should be able to name the document it comes from, who measured it, and the line in the client’s reply that approves publishing it. If you cannot, describe the change without the number (“purchasing decisions moved from the founder to two category managers”) or leave it out. If you are still finding and sorting your stories, start with how to find and organise real stories for your book.

Start with the story log, not chapter one

Before you write another paragraph, list every client story you hope to use, give each a treatment, and note the contract and any sponsor beside it. Send the permission requests for the three stories the book cannot do without, using the template above, and log the replies.

Then draft the chapter whose anchor story is already cleared; you will write more freely when you are not guessing what you may say. If you work under heavy NDAs and the list comes back mostly empty, that is useful too. Plan the book around patterns, your own decisions and labelled hypotheticals from the start; our consultant’s guide to writing a book shows how to build an anonymised evidence ledger from engagements.