If you have a legitimate license, follow these steps to generate or request an activation code: Locate Serial Number and Product Key Sign in to your Autodesk Account and navigate to All Products and Services Select AutoCAD 2013 to view your Serial Number Product Key (the standard key for AutoCAD 2013 is Generate Activation Code Online Autodesk Product Registration and Activation
If you are a student or educator, you can get free access to Autodesk software for educational purposes through the official Autodesk website. Autocad 2013 Activation Code Generator