I've never had that happen to me, and if it does I'll send the item back. This isn't something that should keep you up at night.
I'm also waiting to see if I get banned for "abusing" their return policy which legitimate customers have reported happening.
Trendy brands of clothes or accessories don't even bother. Supposedly real brand name ICs and small electrical components, completely hopeless.
Throw in the fact that they don't notify you when your shipping times changes and it almost always seems to push out a day or two as soon as you purchase it and I've practically quit shopping on Amazon unless I can't find it anywhere else or I don't care about the quality that I'm getting.