After you have received a formal quotation from us, there are roughly two ways in which we accept orders. The first and most common one is to simply submit an official Purchase Order (PO) from your company or institution to crystals@spl.eu or by faxing a PO to +31756120491. The order is firm after we receive the PO and will be confirmed by email within at most a few days. The order confirmation will contain the estimated shipping date and the invoiced amount is due upon receipt of invoice. The invoice in turn is issued after the goods are shipped. The second option to place a PO is to request a pro forma invoice. Once we have provided the pro forma invoice to you, the order will be confirmed after receipt of payment and production of the crystal will begin thereafter.