[mothered]

For example i order my gpu on amazon nl. Next i order something with the same weight to another address with a totally different account. When they both arrive i swap the object and return the wrong one i dont want to keep. Simple as that?

Correct.

Firstly, contact them and say an Incorrect Item was received. See how they respond to that.

And if in the detail page i do not see the weight of the gpu shipping but only the weight of the product itself?

That's why every SE'er must have kitchen scales readily available.