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I've done it before. 3 times with Amazon and I've been successful everytime.

Tips: Buy a scale because some items are slightly off if you go by Amazon's weight. Generally they are on point but just to be sure.

Call right after receiving the package. You want to make it seem like you just received the package and you're frustrated that you got the wrong item. 

They may or may not do an internal investigation (Happened to me once). If the weight of both items was almost the same weight, you'll be okay.

Buy the other item from another account that's not linked to you in any way. (IP address, name, phone, credit card. You know the drill)

Good luck.

Would it be better to buy the “wrong item” from like target or Walmart instead of using amazon that can possibly tie your SE account together?