Part of Costco's appeal — besides its inflation proof hot dogs and rotisserie chicken — is its unrivaled return policy. From electronics to used bed sheets, members can return almost anything at any time. That said, some returns are so clearly outrageous that employees have to say no. Costco workers recently shared stories of the most ridiculous returns on Reddit, including used underwear, rotten salmon, and other shocking products. Not already a Costco member? You can apply here.