Holiday Inn is actually accepting other currencies for motel room payment. This idea is incorrect and obviously causing some confusion. Online payments are invariably done by a payment processor and they determine currency requirement, not the company concerned. It should also be borne in mind that in order to make the payment you would need a card funded in the currency selected. If Iraqi banks issue cards in IQD it would be up to the processor if such cards were accepted, nothing to do with Article 8, although wider use of the currency is a move in the right direction.