Yes. The MHS requires all reproduction request be paid before files are delivered. However, you will have an opportunity to review and approve your invoice prior to completion of the work. Once you have approved the terms of your order, you may pay at any point. Once an invoice has been paid, the MHS will only adjust it if the final cost changes more than $10.00 due to unforeseen circumstances. If the final cost of an order changes more than $10.00 following invoice approval and payment, you will be notified by email.