If you don’t own a legitimate CS3 license, don’t waste time chasing invalid codes. Instead, consider:

The code you referenced is a part of the "offline activation" process used when a computer cannot connect to Adobe's servers. In the past, you would provide a to Adobe, and they would return an Authorization Code . Since the retirement of these servers:

Resolving the Adobe Photoshop CS3 Activation and Authorization Code Dilemma

By . They deleted the specialized offline installers and ceased issuing the non-activation product keys. Adobe Customer Care agents are physically unable to generate override tokens or provide setup files for CS3. Avoid Online Crack and Code Generators Activation Server Retirement - Adobe Community

Users would call Adobe support, read the number sequence, and a representative would supply a unique authorization code to unlock the program permanently. Photoshop CS3 authorization Code - Adobe Community

The window paused. The little hourglass icon spun. One second. Two seconds. The rain hammered harder against the window. The fan in the computer tower whirred aggressively.

When you purchased Photoshop CS3, you received:

It was a typical Monday morning for John, a freelance graphic designer, as he sipped his coffee and stared blankly at his computer screen. He had a deadline looming for a new project, and he needed to get started on it ASAP. But as he opened up Adobe Photoshop CS3, he was greeted with a frustrating familiar sight: the activation screen.

To use any legacy workaround, you must prove ownership of the software. You can find your original 24-digit serial number (which is different from an authorization code) by: Checking the original physical DVD sleeve or product box.