: If you registered your product, sign in to your Adobe Account . Under Registered products , your 24-digit serial number will be listed.
Even if you possess an old serial number, or find one online, you may face technical hurdles: Adobe Illustrator Cs5 Serial Number
Finding a serial number for Adobe Illustrator CS5, a legacy software released in May 2010, depends on how the software was originally purchased. Because Adobe has transitioned to a subscription-based Creative Cloud model, they no longer sell or officially support CS5 serial numbers for new purchases. Methods to Locate Your CS5 Serial Number : If you registered your product, sign in