I was looking at a used aluminum frame Cannondale from 2017 but the serial number sticker is missing:
Cannondale bikes will display the serial number on the underside of the frame. It’ll be next to a bar code.
Source: Cannondale registration pgae
I was wondering if the serial number can be found somewhere else on the frame in case of a missing sticker. I have seen it stamped below the bottom bracket in other brands' aluminum frames, but not on this bike.
Thanks for your help!