Tech Tip: Send Sensitive Files Safely

Most people don't think twice before attaching a file to an email and hitting Send. A contract for signature. A spreadsheet containing customer information. An invoice. A scanned copy of someone's ID. It's quick, convenient, and how we've all worked for years.

The problem is that email was not originally designed as a secure file-sharing platform and once you send an attachment, you lose control of it.

When you send an attachment:

• You can't control who it gets forwarded to.
• You usually can't revoke access after sending.
• The file may remain in inboxes and archives for years.
• It's vulnerable to human error, such as sending it to the wrong recipient.
• Sensitive information can be exposed if an email account is compromised.

For everyday documents, that may not matter. For contracts, invoices, financial information, or customer records, it's worth taking a couple of extra minutes to send them securely.

A Better Way to Share Sensitive Files

Share a secure link instead of attaching the file

Instead of attaching sensitive files directly to an email, upload them to a secure cloud storage platform such as OneDrive, Google Drive, or Dropbox and share a link instead.

This approach provides much more control over who can access the file.

You can typically:

• Restrict access to specific people.
• Require recipients to sign in before opening the file.
• Monitor who has access.
• Remove access when it's no longer needed.

The recipient still gets the file quickly, but you maintain far more control over how it is accessed.

Set an expiry date

One of the most overlooked security features is link expiration.

By setting an expiry date, access is automatically removed after a defined period. This reduces the risk of files remaining accessible long after they've served their purpose.

Good security isn't just about protecting information today. It's about limiting unnecessary access in the future.

Add extra protection for highly sensitive files

For especially sensitive files, consider applying an additional layer of security.

Options include:

• Password-protecting the file.
• Encrypting the document.
• Using a secure file-transfer platform designed for confidential information.

If you use a password, don't send it in the same email as the file. A simple but effective practice is to send the password via text message, phone call, or a different communication channel. If someone gains access to the email, they won't automatically have everything needed to open the file.

A Small Change Can Make a Big Difference

If your organisation still sends contracts, invoices, customer information, or personal records as email attachments, replacing that process with secure file sharing is one of the simplest security improvements you can make.

It takes an extra minute or two, but it significantly reduces the risk of exposing sensitive information.