Sassy Marina has been a client since 2017. They were the first one Jpetrous Creative Services ever had, and nine years later they're still here.

The work that started that relationship wasn't a logo or a website. It was a contract problem — and it's the kind of problem a lot of small businesses have without ever quite naming it.

The Problem: A Contract Anyone Can Edit

A marina runs on seasonal agreements. Summer dockage, winter storage, in-and-out service, and a handful of others go out to every customer every year. For Sassy Marina, that's nearly 300 documents a season, twice a year.

They were sending them as Microsoft Word files.

Here's what that means in practice. A Word document emailed to a customer is a live, editable file. Every term in it — the rate, the dates, the liability language, the cancellation terms — can be changed by whoever opens it. Most people won't. But the document that comes back is not necessarily the document that went out, and there's no reliable way to tell at a glance.

For agreements covering boats worth tens or hundreds of thousands of dollars, stored on someone else's property for months at a time, that's a real exposure. And it usually surfaces at the worst possible moment: when there's already a dispute, and both parties are holding different versions of what they each believe is the same contract.

A Microsoft Word document sent by email is a fully editable file. Any recipient can change any term in it, including rates, dates, and liability language, and return it looking legitimate. For businesses that email contracts, this is one of the most common and least recognized sources of risk.

The Fix: Interactive PDFs With Locked Permissions

We rebuilt Sassy Marina's seasonal agreements from the ground up. The process runs like this:

Build the document in Adobe InDesign. Starting in a layout program rather than a word processor means the design is fixed and intentional — spacing, hierarchy, and the placement of every field are deliberate rather than the accident of whatever the text reflowed into.

Export as an interactive PDF. The exported file carries live form fields: text entry where customers need to type, checkboxes where they need to select, and signature fields where they need to sign.

Test the tab order — all of it. This is the step people skip, and it's the one that determines whether the document is actually pleasant to use. When someone fills out a form and presses Tab, they should land in the next logical field, not jump to the other side of the page. Every field gets checked in sequence, signature fields included. On a multi-page seasonal contract, getting that wrong turns a two-minute task into a frustrating one, and frustrated customers put the form down and don't come back to it.

Apply permission security. Once the fields are confirmed working, the document gets locked with a permissions password. Customers can complete the fields they're meant to complete. They cannot alter the terms, the rates, or any of the underlying language.

Revise seasonally. Rates and terms change year to year, so both the summer and winter agreements get updated annually.

An interactive PDF with permission-based security lets a recipient complete form fields while preventing them from editing the document's content. Build the layout, export with live form fields, verify tab order across every field including signatures, then apply a permissions password to lock everything else.

What Changed

Contracts stopped coming back altered.

Turnaround got faster, which was the unexpected benefit. When a customer can open a contract, tab through it, sign it, and email it back without printing anything, scanning anything, or driving anywhere, they tend to do it that day instead of that week. For a seasonal business where dockage is being confirmed against a deadline, that compounds across nearly 300 agreements.

And the marina got consistency. The same document, correct every time, year after year.

The Honest Limits

Permission-based PDF security is not encryption, and it's worth being direct about what it does and doesn't do.

A permissions password stops normal editing in normal PDF software. A technically sophisticated person with the right tools can strip it. So this isn't a cryptographic guarantee — it's a strong, practical barrier against casual alteration, accidental changes, and opportunistic edits, which is what actually happens in the real world. It also makes any tampering obvious, since a returned document that no longer matches the locked original is immediately suspect.

If you need a legally auditable chain of custody — timestamps, identity verification, a tamper-evident audit trail — that's what dedicated e-signature platforms are built for.

Permission-locked PDFs prevent casual editing but are not encryption and can be circumvented by a determined technical user. For legally auditable signature trails with identity verification, a dedicated e-signature platform is the appropriate tool. For controlling document integrity at low cost and high volume, locked interactive PDFs are usually sufficient.

When Each Approach Makes Sense

Locked interactive PDFs work well when: you send high volumes of the same document, you don't want per-document or per-seat subscription costs, your customers shouldn't need to create an account or log into anything, the documents need to work offline, and your main concern is preventing alteration rather than proving identity.

E-signature platforms work better when: you need a legally defensible audit trail, you need identity verification, you need automatic reminders and status tracking, or the agreements are high-value enough that the per-document cost is trivial next to the risk.

Plenty of businesses use both, for different document types. The mistake isn't picking one — it's emailing live Word files and assuming they come back unchanged.

Questions People Ask

How do I stop people from editing a contract I send them?
Convert it to a PDF with a permissions password applied. This allows recipients to complete form fields while blocking edits to the document's content. Sending contracts as Word files leaves every term open to alteration by whoever receives them.

Can you make a PDF fillable but not editable?
Yes. A PDF can be built with interactive form fields for the information a recipient needs to supply, then secured with a permissions password that prevents changes to everything else. Fillable and locked aren't in conflict — that combination is standard for contracts and applications.

Is it safe to send contracts as Word documents?
It carries meaningful risk. Word files are fully editable, so terms can be changed and returned without any obvious indication. For any agreement involving money, liability, or property, a locked PDF or an e-signature platform is a safer choice.

What's the difference between a locked PDF and an e-signature platform?
A locked PDF prevents content alteration and costs nothing per document, but doesn't verify who signed it. E-signature platforms add identity verification, timestamps, and a legally auditable trail, at a per-document or subscription cost. Locked PDFs suit high-volume, lower-risk agreements; e-signature suits agreements where proving identity matters.

How do you make a fillable PDF with a proper tab order?
Set the field order deliberately rather than relying on the default, then test the entire sequence by tabbing through the finished document — including signature fields. Default tab order often follows the order fields were created rather than their visual position, which produces a confusing experience on any multi-column or multi-page form.

Do interactive PDFs work on phones and tablets?
Generally yes, though behavior varies by PDF reader. Form fields and signature fields are widely supported, but it's worth testing your finished document on the platforms your customers actually use before sending it at volume.

Have a document that keeps coming back wrong? Schedule a free consultation at jpetrous.com | contact@jpetrous.com | 586-563-6634.