Secondly, most jurisdictions require companies to provide proof of export for tax purposes. In an EXW shipment, the buyer is under no obligation to provide such proof to the seller, or indeed to even export the goods. In a customs jurisdiction such as the European Union, this would leave the seller liable to a sales tax bill as if the goods were sold to a domestic customer. It is therefore of utmost importance that these matters are discussed with the buyer before the contract is agreed. It may well be that another Incoterm, such as FCA "seller's premises", may be more suitable, since this puts the onus for declaring the goods for export onto the seller, which provides for more control over the export process.