(proposal from Google)

It would be useful for Schema.org to have expressivity that allowed various merchants to describe their return policies. As always there are various levels of detail that might be made explicit. Our suggestion is to start with something like the following:

Main concepts:

• Return Policy URL
• Return Window Type [Finite, Infinite, Final Sale (no returns accepted)]
• Refund Type [Store Credit, Full Refund, Exchange]
• Return Fees [Original shipping, return shipping, restocking fees]

Plus these as "useful to have":

• Are in-store returns offered? [Yes, No]
• Exceptions [Category, Return Information including window, type, fees]

Exceptions would be things like "this policy applies to everything except fish and electronics..." and are consequently difficult here because of the lack of a common taxonomy to point into. The usual Schema.org workaround in such a case would be to at least document text or URL values.