We're happy to invoice libraries and institutions both within the UK and overseas with credit terms of 30 days. Librarians and institutional customers are invited to take advantage of the special payment option offered at page 3 of the Checkout, ie: "This is an institutional order and we wish to pay by invoice on receipt of the books". If you have any particular ordering requirements or requests, such as the recording of official purchase order numbers, please enter these in the designated box on that page. We're able to accept your payment in sterling, US dollars or Euros - by cheque or directly by electronic bank transfer - as you wish. For further details, please email us at reservations@naomisymes.com