Short version: When you send a PDF, a lot of information travels with it invisibly - who created the file, when, with what software, deleted comments, previous draft versions, and image regions you thought were cropped away. This guide explains what actually gets sent and how to create a clean copy before sharing with a lawyer, client, or potential employer. Quick fix: run the file through the PDF/A converter on PDF File to generate a clean copy.
What Actually Happens
You send a proposal, resume, or contract. The recipient checks the file properties and sees someone else's name - a friend who helped edit it, a previous employer whose template you used, or a public computer's account name. Renaming the file doesn't help - the author name is stored inside the file, not in the filename.
This happens because most people check how the file looks, not what it contains. Freelancers sending proposals, students submitting assignments, job seekers sending resumes - all can send a file with information they didn't intend to share, without knowing it.
Table of Contents
- What your file reveals
- Types of hidden information
- When it actually hurts you
- How to clean before sending
- Pre-send checklist
What Your File Reveals
Every PDF stores several layers of information, some visible and some not. In a standard viewer you see only the content - text, images, pages. But underneath there's more:
Author name - usually the user account name on the computer where the file was created or last saved. If the computer is registered under a company name, that name appears.
Software name - "Microsoft Word 2019", "Adobe Acrobat Pro DC", "Google Docs". This reveals what tools you use.
Creation and edit dates - when the file was first made, when it was last changed. Useful for anyone who wants to know if this is fresh work or a recycled template.
Comments and annotations - sticky notes, color highlights, and corrections can remain even after "deleting" them, depending on how the file was saved.
Previous versions - some editors keep a history of changes inside the file. You delete a paragraph, save, write a new one, save again - the old paragraph may still be recoverable.
Hidden image areas - insert a large image and "crop" it to show only part - the cropped portion usually stays in the file, just hidden.
Types of Hidden Information - Most Common
1. Wrong author name
Most common. You send a file and the author name is the person whose computer made it. If it's your own computer, fine. But if you borrowed a computer, worked at a library, or used someone else's template - their name stays.
This becomes a problem when submitting documents to official bodies - an unrecognized name in the author field can raise questions about who actually prepared the document.
2. Comments that weren't fully removed
You worked on a contract with a colleague who added notes - "double-check this clause", "this is wrong, remove it". You deleted most of them, but two or three remain buried. A standard viewer won't show them, but anyone who opens the file in a more capable tool will see everything.
3. Draft paragraphs
You typed a paragraph, deleted it, wrote a new version. Saved. Came back, deleted that, wrote a third version. The old versions may still be inside the file if it wasn't saved clean.
4. Uncropped images
You cropped a photo to show only the face, cutting out the background. But the original full image - potentially containing location info, other people, or identifiable details - remains in the file. Just hidden.
5. Software metadata
Word sometimes saves phone note text, early versions of the document, or typed-then-deleted text. Some of this carries over when converting to PDF.
When It Actually Hurts You
Not every file with hidden information is a problem. It depends who you're sending to and why.
Legal contracts - a mismatched author name, partially deleted comments from the opposing party's lawyer, or old draft versions can be treated as legal evidence of intent, prior negotiation, or third-party involvement.
Resumes - a serious employer checks the author name. If it's a third party's name, it raises questions about whether the work is genuinely yours.
Business proposals - a careful client notices the software name. A proposal built in a basic home version of Word looks different from one created in a professional system.
Court filings - some registries and courts check metadata integrity and require a "clean" document.
Academic work - instructors and supervisors check authors. A file with a classmate's name or an external source name can be flagged as plagiarism.
How to Clean Before Sending
Several ways, from quickest to most thorough:
Method 1 - Quickest (5 seconds)
Upload to the PDF/A conversion tool on PDF File. The tool creates a new copy of the file - no old author name, no hidden comments, no draft history. Looks identical to the original but clean.
Method 2 - Through Word (before creating the PDF)
Open the document in Word. Go to File > Info > Check for Issues > Inspect Document. Check all boxes, click Inspect. You get a list of all hidden information. Click "Remove All" for each item. Then save as PDF.
Method 3 - Print to PDF
Open the file in any standard viewer. Click Print. Choose "Microsoft Print to PDF" or "Save as PDF" as the printer. Save. The output is a completely new file without the hidden layers of the original. Note: this method loses form fields, hyperlinks, and bookmarks.
Pre-Send Checklist
Before hitting send to a lawyer, government office, potential employer, or client:
- Author name in Properties is yours (or your business name)
- Software name in Properties is what you're comfortable showing
- Creation and edit dates make sense
- No yellow, purple, or color markup comments from drafting
- Images were cropped in an image editor before insertion, not just within the PDF
- No deleted draft paragraphs hidden in the background
- File was passed through a conversion tool or reprinted
- You opened the final file and verified Properties are clean
Common Mistakes to Avoid
"I renamed the file, that's enough" - No. File name and author name are separate. Author name is inside the file.
"I deleted the comments so they're gone" - Not always. Some editors leave traces of deleted comments.
"I sent it through WhatsApp so it got compressed and cleaned" - WhatsApp doesn't necessarily compress or clean PDF files. Only images get compressed.
"If my viewer doesn't show the info, the recipient's won't either" - Your viewer and the recipient's may be different. Adobe Reader, Mac Preview, and PDF-XChange show different levels of detail.
Summary
A PDF is like a container with walls you can't see through your standard viewer. Most viewers show you only the content, but inside the file are layers of information - who created it, when, with what software, what existed before, which comments were deleted, which image areas were cropped.
Before an important send, spend one minute cleaning. Whether through the PDF File tool, Inspect Document in Word, or a reprint - the file that goes out will be clean and professional.
The recipient won't always check. But if they do, and they find someone else's name, a deleted comment, or a date that reveals it's a recycled old template - that can be the difference between a signature and a rejection.
Want to convert to PDF/A now?
With full Hebrew support
Frequently Asked Questions
How do I see what information is hidden in my PDF?
Right-click the file on your computer, choose Properties (Windows) or Get Info (Mac), and look under Details or More Info. You'll see the author name, the software used, and creation/edit dates. That's just the surface - there can be more layers like deleted comments or hidden image regions that a basic viewer won't show.
I renamed the file but the old name still shows. Why?
The file name and the author name are two separate things. The file name is what you see in your folder. The author name is stored inside the file and tied to the user account that created or last saved it. Renaming the file doesn't change the author name.
I deleted a comment, then sent the file. Can the recipient still see it?
Sometimes yes. Some editors save the history of changes inside the file, similar to Track Changes in Word. The deleted comment may still be there, just hidden from the default view. The safe approach is to pass the file through a conversion tool that creates a completely new file before sending.
I cropped a photo inside a PDF. Is the cropped part really gone?
Not always. In most cases cropping only hides the area - the original pixels remain inside the file. Someone with the right tool can extract the full uncropped image. If the original photo contained sensitive information (ID numbers, signatures, bank details), cover it in the image itself before inserting into the PDF.
I'm sending a resume - what should I check?
Check the author name (should be yours, not a friend's or family member's who helped), the creation date (can reveal the file is old and just updated), and the software name. If you used someone else's template, their name may be embedded in the file.
What's the quickest way to clean all of this?
Upload the file to the [PDF/A conversion tool](/convert-to-pdfa) on PDF File. It creates a new copy of the file without the old author name, hidden layers, or draft history - looks identical to the original but is clean.
Can I trust 'Save as PDF' from Word?
Partially. Word will include the author name from your account settings, the template source, and sometimes change history. Before saving important files to PDF, go to File > Info > Check for Issues > Inspect Document and remove all personal information. Most people skip this step.