If you have the original packaging, you can find the serial number and validation code in the following locations: The Software Box:
If you have the physical box but cannot find the card, check these common locations: The CD Case/Sleeve quarkxpress 50 serial number top
The DTP community, like many creative fields, has historically been a hotbed for software piracy. Websites that promise “free serial numbers” undermine the licensing model and expose users to several risks: If you have the original packaging, you can
Note that modern versions of QuarkXPress have transitioned to account-based or email-based licensing rather than static validation codes. Quark Software, Inc. QuarkXPress Activation Help | Quark Support If you have the original packaging