For older versions like QuarkXPress 5.0, check the installation card or the invoice that came inside the DVD or CD box.
The Product Activation dialog box should appear automatically. quarkxpress 50 product validation code
If you are upgrading from an older version, you may need to enter your "active base serial number" on the Quark Retrieve Validation Code page to generate a new code for the current version. How to Use the Code for Activation For older versions like QuarkXPress 5
Click Sign-in or Continue . For modern versions, an active internet connection is typically required to complete the handshake with Quark's servers. Troubleshooting Common Issues QuarkXPress 5.0 Serial Number Lookup & Activation Code Help How to Use the Code for Activation Click
Depending on how you purchased your software, your code can be found in a few specific locations: