Maybe they meant items that are “shipped” by third party sellers, as opposed to items “sold” by third party sellers?
For example, here is a Lenovo power adapter (I need a new one) that is sold by a whole slew of different sellers on Amazon (none of them is Amazon.com):
http://amzn.com/dp/B089DLFCC1
The third party sellers Derrick Inc, Park Computer, Zion Options, Best Price Power Adapter, Notebook Parts Outlet, and RePower Electronics all use Amazon’s fulfillment service, so it shows that it’s “shipped by” Amazon and will say “free returns” on the product page.
If, however, you order that item from LPI, Austin Power, AuMarco, or VT Netware, they will ship it directly to you (it won’t ship from an Amazon warehouse), and returns are subject to the individual seller’s policy (and responsiveness).
