Real or Fake ? Scotty Cameron newport 2.5

that brand of putters were made from 303 stainless steel as per scotty cameron's website.

Stainless steel type 303 is non magnetic. researching a little more, the weights in the sole were not stainless steel so could be holding the magnet.

possibly using a pretty strong magnet it could stick very slightly, but if you have an average fridge magnet and it sticks strongly then you are likely holding a plated carbon steel putter.

carbon steel is cheap and hence what all fakes are made out of. this model all had codes laser etched onto the shaft beneath the grip.

the magnet test is generally a good rule of thumb depending on the model, but there are usually enough other giveaways to confirm authenticity or lack thereof.