returnPolicyCategory

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > returnPolicyCategory

A returnPolicyCategory expresses at most one of several enumerated kinds of return.
Values expected to be one of these types
ProductReturnEnumeration
Used on these types
ProductReturnPolicy

Source

https://github.com/schemaorg/schemaorg/issues/2288