Our intent is to always ship via the carrier you choose and to use your shipping account number if provided; however, all the carriers (UPS, FedEX, and DHL) have different pickup schedules during the day and evening. Our last pickup is provided by UPS. If your order is ready for pickup after the final pickup time by your requested carrier we will change the carrier, as we assume that it is more important to you that you receive your order on time as expected rather than what carrier is used. In doing so, we will not be able to use your shipping account number. We will ship it on our account and add the shipping charges to your invoice. If you request a change to this policy, we will be glad to hold your order until the following day's scheduled pickup by your preferred carrier.