Did they open your PDF? How to tell.

Can you tell if someone opened your PDF?

Mostly, no. An attachment is a copy. Once it arrives, it lives on her laptop, her phone or her company's file server, and she opens it in a PDF reader that has no reason to tell you anything. Your email can sometimes report on itself. The file reports nothing, and neither does the copy she forwards to her finance lead.

Every method people try works around that, and each one answers a narrower question than it seems to:

If you truly need to know, the fix is for the next document, not this one: send the proposal as a link that records reading instead of attaching a file. For the proposal that is already out, skip to what to send now.

Does a read receipt tell you?

Sometimes, and only about the email. Gmail offers read receipts only on work or school accounts, not personal @gmail.com addresses, and the recipient may need to approve one before it reaches you, says Google's Gmail Help. In Outlook, the recipient can decline, some email programs do not support receipts and there is no way to force one, according to Microsoft Support, which adds that the feature is not available for IMAP or POP accounts such as Gmail, Yahoo or iCloud.

When a receipt does arrive, read it narrowly. Google's own page warns that a receipt does not always mean the message was read: on some mail apps, marking a message as read is enough to send one. And even a real receipt is about your two lines, not the file. Olivia can read the email, think "later" and never open the attachment.

There is a cost, too. A receipt request asks a buyer to confirm to a supplier that they have read the supplier's email. It is a small thing, but it sets the wrong tone for a proposal.

What about email open tracking?

Open tracking, the kind sales tools and mail plugins offer, hides a tiny image in your email and records an open when that image loads. Microsoft describes these tracking pixels as invisible images that can tell a sender you have read the email, and says classic Outlook blocks automatic picture downloads from the internet by default.

Other mail apps handle them differently. Apple Mail on iPhone has a setting called Mail Privacy Protection that, in Apple's words, "prevents senders from seeing if you've opened the email message they sent you". Gmail shows images by default and scans them first, and its help page on images says senders can sometimes know whether you opened an email that has an image. "Sometimes" is not a word you can plan a follow-up around.

So a missing open proves nothing, and a recorded one tells you only that the image loaded somewhere. Like a read receipt, the pixel lives in the email. It cannot see a file saved to someone's desktop and opened on Friday.

Can the PDF itself report back?

It can try. A PDF can carry links and scripts, and a "tracked PDF" is one that tries to contact a web address when it opens. Whether that works is up to the reader's software, not you. Adobe's documentation says Acrobat can show a pop-up warning when a PDF tries to connect to an external website or run a script, and its Trust Manager settings let people block PDF files from reaching any website.

Picture it from the buyer's side. Your proposal opens with a security warning. A careful reader closes it, which is what Adobe advises for sources they do not trust, and you get nothing except a worse first impression. A tracked link inside the PDF is gentler, but it tells you about a click, not an open.

If you are on the receiving end and wondering how to tell if a PDF has tracking, in Acrobat that warning is the thing to look for: a document asking to connect to a website when all you did was open it.

What do Drive, OneDrive and Dropbox show?

Sharing the PDF as a cloud storage link instead of an attachment gets you closer, because the file stays on a server. What you see depends on the service, the account and the person opening it.

Google Drive. The Activity dashboard shows who viewed a file. Google's help describes it for Docs, Sheets and Slides files from a work or school organisation, says no one can see the view history of a file not owned by a work or school account, and lets viewers turn their own view history off. That dashboard is also how to tell if someone opened a Google Doc, with the same limits. Drive's activity panel lists edits, comments, renames, moves, uploads and sharing changes; opening a file is not on that list. Neither page gives you a list of who opened a PDF stored in Drive.

OneDrive and SharePoint. Point to a file and Microsoft's file card can show the name and picture of each person who viewed it, with a count of views and viewers, where your organisation's SharePoint administrator has allowed it, according to Microsoft Support.

Dropbox. Viewer info covers people on your team and people you shared the file with, and on some plans shows when they last viewed it. Someone who opens a shared link without being invited appears as a Guest, with no name or email, and someone who downloads the file from the link without viewing it on dropbox.com does not show up at all, as Dropbox's help explains.

In all three, a name comes from an account: someone signed in, on your team or invited to the file. A buyer at another company who downloads the PDF and reads it on a train is the case they show least, and none of their help pages mentions how far anyone read.

What does a tracked link show you?

A document link built for reading is the one method designed for the question: you send a link instead of the file, the reader opens it in their browser, and each visit is recorded where the document lives. Because the PDF no longer travels as a file, it is the only kind of PDF tracking here that shows how far someone read.

A good reading report shows who opened it and when, every visit numbered so a return never hides inside a total, the time on each page, how far down each page they scrolled, where they stopped, and a new reader when the link is forwarded. That last one matters more than it sounds. With an attachment, the forward to the person who signs is invisible. With a link, the decision moving to someone new shows up as a new reader.

In Decktrace, every deck you send comes with that reading report, and you get an email when a reader first opens it or comes back, at most one an hour for each deck. If the proposal already exists as a PDF, you upload it and its pages are kept as they are inside a web deck at one link; how to turn a PDF into a link walks through that and the other ways, free ones included.

On an open link, a reader is a device with an approximate location, not a name, so ask readers to verify their email with a code when names matter. A new reader tells you the link travelled, not who passed it on. And some buyers will still want a file, for a procurement portal or their own records: send one when they ask. When a PDF is still the right call covers those cases.

What about the PDF you already sent?

Leave it where it is. Do not resend the same attachment with "just making sure this came through", and do not send a tracked copy now. Neither gives Olivia a reason to open anything, and the second can greet her with a security warning.

Write a follow-up that works even if she never opens the file. Pick the one part of the proposal that matters most to her, put it in a sentence she can act on, and offer the link version as another way in. Then ask for one small, specific thing.

If she opens the link, you will see it; if she replies, you did not need to. If a week passes with neither, the silence is about the deal, not the file, and that calls for a different email with a reason to reply now: how to follow up on a quiet proposal has one for each case.

Before you press sendRead your follow-up as if the attachment did not exist. If it still makes sense and still asks for something, it is ready.

Is it fair to measure who reads?

It is, when the reader knows. What feels wrong is finding out afterwards that a document reported on you without saying so. Three habits keep it fair:

• Say what is measured, before they read. In Decktrace, readers see a short notice about what is measured before the deck opens, and agree to reader terms that say the sender sees it.
• Never quote the report back. "I saw you spent two minutes on pricing" turns a buyer into a suspect. Let the report shape what you send, not what you say.
• Read facts as facts. Two minutes forty on the rollout page says where Olivia spent her time, not why. She may like the plan, or be stuck on week three. The report tells you where to look, not what she thinks.

A checklist for the next PDF you send

• Decide before sending whether you need to know it was read. If you do, send a link, not an attachment.
• Treat read receipts and open tracking as news about the email, when they work at all, never about the file.
• Skip trackers hidden inside the PDF. If their reader warns them, that warning becomes your first impression.
• If you share from Drive, OneDrive or Dropbox, check what your account actually shows before counting on it.
• Put the point of the proposal in the subject line and the first sentence of the email.
• Tell readers what is measured, and never quote the report back to them.
• Keep a PDF ready for portals, signatures and anyone who asks for one.