How to Protect Your Design Before Sending It to a Client: A Checklist for Architects and Designers

Want to protect your design before sending it to a client? The honest answer is that you can’t stop someone copying a PDF once it’s in their inbox. What you can do is decide what they’re allowed to do with it, send only what they need, and keep a record of exactly what you sent and when, made before it left your studio. That record matters most in the situations architects and designers dread: the fee proposal that goes quiet and then the building turns up anyway, the tender you lost to a scheme that looks a lot like yours, or the rejected logo concept that appears on a shopfront six months later. This guide is a practical checklist for the moment before you press send.

Disclosure: I’m Inna Hall, an Australian lawyer and co-founder of TimeBinder, which is mentioned below. This is general information, not legal advice. Copyright and contract law differ between countries, so get advice on your own situation.

What copyright already gives you (and what it doesn’t)

In Australia you don’t register copyright. It exists automatically once the work is in material form. According to the Australian Copyright Council, house plans, architectural drawings, models and buildings are generally protected as artistic works. The Australian Institute of Architects’ Acumen notes that any drawing or sketch, by hand or in CAD, counts, and that renderings are protected too.

Three points catch people out:

• Paying for a design doesn’t usually mean owning it. Unless copyright is assigned in writing, it generally stays with the designer (or their employer). The client usually gets an implied licence to use the plans for the purpose they were commissioned for, such as building that house on that site. The High Court considered the scope of that kind of implied licence in Concrete Pty Ltd v Parramatta Design & Developments (2006).
• Ideas aren’t protected. An open-plan three-bedroom layout or a “warm minimalist” brand direction is an idea. Your particular drawing of it is protected, the concept on its own isn’t. So for concepts, confidentiality and your contract do more work than copyright.
• Copyright is about copying. If you ever have to rely on it, the questions are what your work looked like, when it existed, and whether the other side had access to it. Those are questions of evidence, and the evidence is easiest to create before you send anything.

Where design work usually goes missing

It’s rarely a stranger. It’s usually someone you sent files to:

• Concept stage, then silence. A client gets sketch designs and a fee proposal, declines, and later builds something close to the scheme using a cheaper drafter.
• Lost tenders and pitches. Your approach turns up in the winning bid, or in a project the client delivers in-house.
• Rejected concepts. The client picks option A, pays for it, and later uses option C as well.
• Unpaid invoices. The client has the final files, stops paying, and keeps using them.
• People leaving. A staff member or contractor leaves and says a design was theirs, or that it existed before they joined.

In every one of these, someone will eventually ask “what exactly did you send them, and when?” File dates on your computer won’t settle that. They change when files are copied, synced or re-saved, and they’re easy to edit.

A 7-step checklist before you send

1. Put the terms in writing first

Before any concept leaves the studio, have something in writing that says who owns the work, what the client may do with it, and when. Useful lines include: copyright stays with you; the client’s licence starts on payment; concepts that aren’t chosen stay yours and can’t be used; and pitch material is confidential and may only be used to assess the pitch. For pitches, the UK’s Institute of Practitioners in Advertising suggests a pre-pitch NDA that says the material belongs to the agency unless it wins the work. The same idea works for design studios. A lawyer can turn your standard terms into something short that clients will actually sign.

2. Send only what they need to decide

A client reviewing a concept needs to see it, not build from it. Send a flattened PDF or images at screen resolution. Keep native files (Revit, ArchiCAD, SketchUp, Illustrator, Figma), DWGs and print-ready artwork until the terms are agreed and the invoice is paid.

3. Mark every page

Add a short notice to each sheet or slide, for example: “© [Studio name] 2026. Confidential. Provided for evaluation only. Not for construction or reproduction.” A notice doesn’t create rights you didn’t already have, but it removes any argument that the client didn’t know.

4. Freeze the exact version

Export the set you’re about to send and stop editing it. Give it a name that says what it is, such as Smith-House_concept-B_2026-10-26_v03.pdf. Don’t overwrite it later, and avoid sending a live cloud link that keeps changing. If you later need to show what the client saw, you want the identical file, not today’s version of it.

5. Timestamp those files before they go

This is the step most studios skip. Take the frozen PDF, the key renders, the native file at that stage, and the fee proposal or brief, and give them an independent date. With TimeBinder your browser calculates a SHA-256 fingerprint of each file and records it on the Bitcoin blockchain, and you get a Proof of Time Certificate. One TimeBind holds up to 10 files, so a concept set and its supporting files can go together. The files themselves are never uploaded, which matters when the work is confidential. You can see how a fingerprint works with our free SHA-256 file hash checker. Change a single pixel and the fingerprint changes completely.

6. Send it in a way that leaves a trail

Attach the file to an email, or use a transmittal, so there’s a record of who received which file. If you upload to a tender portal, save the submission receipt. Emailing a copy to yourself is a common habit, but it only gives you a date on a server you don’t control. We compare it in emailing yourself vs a blockchain timestamp.

7. Keep one evidence folder per project

For each send, keep the exact files, the certificate, the email or transmittal, the contract or fee proposal, and any client feedback. It takes two minutes at the time. Rebuilding it a year later, after a falling out, takes far longer and looks far weaker.

Tenders, pitches and design competitions

Competitive work needs extra care because you’re handing detailed thinking to people who haven’t hired you.

• Read the conditions before you design anything. Some tender and competition conditions ask entrants to grant a licence over what they submit, or to give up rights in unsuccessful entries. If the clause is unacceptable, ask about it early or think hard about how much to show.
• Show the outcome, not the method. Where you can, explain what your approach achieves without handing over a buildable scheme or your detailed working method.
• Timestamp the submission exactly as uploaded, plus the earlier concept work behind it. If your approach later appears elsewhere, you can show which files existed before the tender closed, unchanged.
• Write down what was said. After a pitch meeting, send a short email confirming what you presented and that it was shared in confidence.

Our page on timestamping for designers and architects suggests building this into your stage gates, so it happens at concept, design development and documentation without anyone having to remember.

What a timestamp shows, and what it doesn’t

Be clear about the limits. A blockchain timestamp shows that a particular file existed no later than a certain time and hasn’t changed since. It doesn’t prove who designed it, that the design is original, that you own it, or that the client copied it. It also doesn’t replace a contract. What it does is take one argument off the table, the argument about when your version existed, so the real questions get looked at on solid ground. A notary, by comparison, usually confirms who signed something rather than when the contents existed. See blockchain timestamp vs notary.

An illustrative example (not a real case): a two-person residential practice sends concept sketches and a fee proposal to a couple planning a new house. The couple decline on price. Eight months later the practice sees a development application with a very similar plan, prepared by a drafting service. Because the practice TimeBound the concept PDF, the SketchUp file and the fee proposal on the day they were emailed, it can show that those exact files existed before the drafter was engaged, and the email shows the couple received them. Whether that amounts to infringement, and what the couple’s licence covered, are questions for their lawyer. But nobody can credibly say the practice drew its scheme afterwards.

For a longer story about how this plays out inside a firm, see how architectural design timestamping protects your firm, and for pitch decks and brand work, design file proof of creation before a pitch.

Pooled or ASAP for design work?

A Pooled TimeBind uses 1 Token. Your fingerprint is grouped with others and written to Bitcoin, usually within about 24 to 36 hours, and checking it later goes through TimeBinder. An ASAP TimeBind uses 3 Tokens and gets its own Bitcoin transaction, so anyone can check it on the blockchain without TimeBinder. A sensible split for most studios:

• Pooled for routine revision rounds and internal milestones.
• ASAP for anything likely to be argued about later: tender submissions, concept sets sent with a fee proposal, and final issued drawings.

The Free plan gives you 1 Token a month, enough for 1 Pooled TimeBind, and no credit card is required. If you need more, Tokens start at $5 (USD) and bought Tokens never expire. Studios that send work every week usually find a plan cheaper. See the pricing page for current plans, or the ASAP vs Pooled explainer for the detail.

AI can rewrite files. It can’t rewrite time. Before your next concept set goes out, give it a date nobody can quietly change.

TimeBind Files Now →

This article is general information, not legal advice. Sources were checked on 26 October 2026. More free tools for creators are on our free tools page.