If the code is rejected, double-check:

Mid-generation versions moved away from hardware dongles. They introduced a combination of a serial number and a matching validation code, which required internet or telephone activation to generate a final authorization file.

If you encounter issues during product validation, here are some troubleshooting tips:

If the software was purchased directly from Quark, the validation code may be printed on your invoice or purchase confirmation email.

If you are reinstalling QuarkXPress 5.0 on a legacy machine, you will need the original physical documentation.