I have the Moshi Palm guard and I almost guarantee it won't void warranty and here's why. Firstly it's just an accessory that goes on top of the laptop and in no way affects the casing or insides of the computer. Secondly it peels off leaving no debri so if you are worried you can just take it off, stick it to something else while your laptop is getting fixed, then put it back on no worries. Hope this helps!