It's not just auto parts stores and oil filters. I've seen plenty of faucets for sale at Home Depot that have been returned, either after being installed, or with missing parts. Some have even had the boxes re-banded.
Years ago, I returned a defective motherboard to a computer store for exchange. The proprietor didn't believe it was bad (sound didn't work correctly), and I'm pretty sure he put the returned one back on the shelf.
So you have dishonest customers, and sometimes dishonest store staff.
Years ago, I returned a defective motherboard to a computer store for exchange. The proprietor didn't believe it was bad (sound didn't work correctly), and I'm pretty sure he put the returned one back on the shelf.
So you have dishonest customers, and sometimes dishonest store staff.