If you're a student, a teacher, or someone looking to learn Photoshop CS3 for personal projects, there are several legitimate paths you can take:

Would you like help finding a modern free alternative instead?

But if you don’t have a legitimate license, no code will legally or practically work anymore.

So why do people still search for “authorization code for Photoshop CS3”? Mostly because they find old installation disks, or they download abandonware versions from untrusted sites, and then hit the activation wall. The codes floating around on keygen sites are either: