I encountered fake Nudies at CrossRoads, a local chain store/ consignment store here in the Seattle/ Portland area.
I am sure there is examples online but here is what I noticed:
Back Belt loop tag: Wrong font style.
Back Pocket tag says: Nudie. a real Nudie would say Nudie Jeans Co.
The backpocket embroidery 'wave' is not as tight, meaning the threads are further apart then the real ones.
But those look real but it does not have the embroidey signature wave is not there or the backpocket tag.
But either way real or not...The quality of Nudies are crap in general.