I use Poshmark. I purchased a Burberry from a seller, and when I received it, it was not authentic. I didn’t accept it. Instead, I clicked on the ‘problem’ option below it, which opens a case for review. PM allows 3 days to accept, before they release any moneys. My case was approved for a return, and I was refunded to full amount to include what would have been PMs cut. Hope this helps in the future.I don't think the seller would refund me 100% since posh has already taken a cut of their earnings. And there's no guarantee in place to do a secure return outside of Poshmark.