This article does a thorough job of explaining the concept of provenance--what it is and why it is important:
www.bellissimafineart.com
How important is provenance to you when you purchase Hermès from anywhere other than an Hermès boutique? What particular aspect of provenance is compelling enough for you to confidently purchase Hermès without any concern regarding a piece's authenticity?
Provenance: What It Is and Why It Matters. - BellissimaFineArt.com
Provenance: What It Is and Why It Matters. From the French word, provenir, meaning “to come from,” provenance is the chronology of the ownership, custody, or location of an object. Provenance is the documentation used to authenticate a particular art piece. These documents are used in general...

How important is provenance to you when you purchase Hermès from anywhere other than an Hermès boutique? What particular aspect of provenance is compelling enough for you to confidently purchase Hermès without any concern regarding a piece's authenticity?