While PEXA is a browser based platform, to digitally sign documents in PEXA using your PEXA Digital Certificate (USB Device) you need to install additional software. The installation process will require downloading software onto your computer. If you require Administrator access to be able to successfully download software, ask your network administrator to log in to your system and install the software for you.
Choose your current Operating System from the options below
Click here to check which browser you are using, and scroll down to view tailored installation instructions.
After these steps, click here to confirm that you are ready to sign!
For complete information on the Operating Systems required please see here. PEXA recommends using Google Chrome as your browser. Please ensure you regularly upgrade your browser to get the most from the PEXA Platform and the Internet as a whole, including advances in security.
Windows and Google Chrome
You will need to install THREE pieces of software. You must be on Chrome version 45 or above (click here to check your version).
Note: Click on the grey + button to expand the section.
- Step 1: Digital Certificate Software
-
- Click here to install the Digital Certificate software via our website.
- Enter your email address and ABN. Click Submit and select Download for Windows.
- Once downloaded, open and run the file. Accept the terms and conditions, leave all other options as they default, and click Next to proceed through the installation.
- After you have installed the program, you may see an idOnDemand plugin screen. Click Cancel >Yes > Finish to cancel the idOnDemand Updater Plugin installation.
- Lastly, click Finish.
- Step 2: Google Chrome extension
-
- Click here to install the PEXA Digital Signing extension via the Google Chrome Web Store.
- Click on +ADD TO CHROME.
- Click Add extension. A confirmation message will appear.

- This step is now complete and you can close the Chrome Web Store extension tab.
- Step 3: PEXa signing application
-
- Click here to begin the installation process for PEXA's signing application.
- Once the file has downloaded in the bottom left hand corner, click on the file.
- Accept the terms and conditions, leave all other options as they default, and click Next to proceed through the installation.
- Lastly, click Install and then Finish.
Note: if you receive the below error when tying to install the software in step 3, please click here for an alternative download link. Once you have done this, proceed from step 3.2 above.

Windows and Internet Explorer
You will need to install TWO pieces of software. Please ensure you are using Internet Explorer (IE), and not Microsoft Edge (click here to check your version).
Note: Click on the grey + button to expand the section.
- Step 1: Digital Certificate Software
-
- Click here to install the Digital Certificate software via our website.
- Enter your email address and ABN. Click Submit and select Download for Windows.
- Once downloaded, open and run the file. Accept the terms and conditions, leave all other options as they default, and click Next to proceed through the installation.
- After you have installed the program, you may see an idOnDemand plugin screen. Click Cancel >Yes > Finish to cancel the idOnDemand Updater Plugin installation.
- Lastly, click Finish.
- Step 2: PEXa signing application
-
- Click here to begin the installation process for PEXA's signing application.
- Once the file has downloaded, open and run the file.
- Accept the terms and conditions, and leave all other options as they default, and click Next to proceed through the installation.
- Lastly, click Install and then Finish.
Note: if you receive the below error when tying to install the software in step 3, please click here for an alternative download link. Once you have done this, proceed from step 3.2 above.

Windows and Mozilla Firefox
You will need to install THREE pieces of software. You must be on Firefox version 52 or above (click here to check your version).
Note: Click on the grey + button to expand the section.
- Step 1: Digital Certificate Software
-
- Click here to install the Digital Certificate software via our website.
- Enter your email address and ABN. Click Submit and select Download for Windows.
- Once downloaded, open and run the file. Accept the terms and conditions, leave all other options as they default, and click Next to proceed through the installation.
- After you have installed the program, you may see an idOnDemand plugin screen. Click Cancel >Yes > Finish to cancel the idOnDemand Updater Plugin installation.
- Lastly, click Finish.
- Step 2: Mozilla Firefox Extension
-
- Click here to install the Mozilla Firefox Signing extension via the Firefox Add-on Store.
- Click + Add to Firefox.
- Click the blue Install button in the top left hand corner of your screen. A confirmation message will appear. Click OK.
- This step is now complete and you can close the Mozilla Add-on tab.
- STEP 3: PEXA SIGNING APPLICATION
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- Click here to begin the installation process for PEXA's signing application.
- On the dialogue box, click Save File.
- Click on the completed download when it appears in the top right hand corner (if you cannot see the file, click the blue downward arrow at the top left of your browser; it should be the first result in the list).
- Accept the terms and conditions, leave all other options as they default, and click Next to proceed through the installation.
- Lastly, click Install and then Finish.
Note: if you receive the below error when tying to install the software in step 3, please click here for an alternative download link. Once you have done this, proceed from step 3.2 above.

Mac and Google Chrome
You will need to install THREE pieces of software to sign documents on a Mac.
Note: Click on the grey + button to expand the section.
- Step 1: Digital Certificate Software
-
- Click here to install the Digital Certificate software via our website.
- Enter your email address and ABN. Click Submit and select Download for Mac.
- Click on Save File. Click on the downloaded file, and then double click on the CSSI PIV 5.2.3.pkg.
- Accept the terms and conditions, and leave all other options as they default, and click Continue to proceed through the installation.
- If asked for a password, enter your Mac/Apple password, and then click on Install Software. Click Close on the Installation Successful screen.
- Lastly, click Move to Trash, as you have already installed the software.
- Step 2: Google Chrome extension
-
- Click here to install the PEXA Digital Signing extension via the Google Chrome Web Store.
- Click on +ADD TO CHROME.
- Click Add extension. A confirmation message will appear.

- This step is now complete and you can close the Chrome Web Store extension tab.
- Step 3: PEXa signing application for mac
-
- Click here to begin the installation process for PEXA's signing application.
- Once the PexaDigitalSigning.pkg has downloaded, open and run the file.
- Accept the terms and conditions, and leave all other options as they default, and click Next to proceed through the installation.
- Lastly, click Install and then Finish.
Updating Your Digital Certificate PIN
Once you have completed your Digital Certificate installation, we recommend updating your default PIN to something relevant and easy to remember. For instructions on how to update your PIN, click here.
Further Questions
For any further questions on installing your digital certificate, please leave a comment below, or alternatively contact the PEXA Support Centre on 1300 084 515.
We'd love to ask you a few questions on your Digital Certificate experience - please answer a few questions here (it'll only take 90 seconds!). Any feedback you give will help us improve the experience for everyone.