Having worked in the finance industry my entire career, most (responsible) firms have means for dealing with taking physical delivery. Less responsible firms, not so much and may be royally screwed if they have to take delivery. I've heard anecdotally of a firm that had to take physical delivery of a shipment of coal. They didn't have plans in place, but because they had an address on a river, the coal arrived via barge. No, I don't recall the name of the firm, and yes, it's just an anecdote/hearsay.