Finding a valid SketchUp Pro 2016 license key and authorization number online is difficult because they are unique to each user
you used for the original purchase so I can help you find the recovery link? Sketchup Pro 2016 License Key And Authorization Number
and linked to a specific purchase [1, 3]. Sharing or using public codes often leads to "Invalid License" errors because those keys have likely been blocked by Trimble [2]. Finding a valid SketchUp Pro 2016 license key
on their official site. You will need your serial number or the email address used for the purchase to retrieve your codes [1]. 3. Consider the Free Version on their official site
Since 2016 is an older version, it no longer receives security updates or support for 3D Warehouse. If you just need to model for personal use, SketchUp Free