To authorize , you need a serial number and an authorization code, which were historically sent via email upon purchase. SketchUp 2016 used a "Classic" perpetual license system, which is distinct from the modern sign-in subscription model. How to Authorize SketchUp 2016
: If purchased through a third party, SketchUp support cannot directly retrieve these keys; you must contact the original reseller. SketchUp Community Single user license 2016 SketchUp pro sketchup 2016 serial number and authorization code
: Look for a confirmation email from SketchUp or an authorized reseller. SketchUp 2016 serial numbers always start with the letter "R" . Within the Software : SketchUp Pro 2016 To authorize , you need