Thank you very much for your mail.
Here below is our process we will proceed issuing invoice.
1. Normal case => The original invoice will be sent together along with product.
2. Special case => In case of there is something need to be changed such as DTC add urgent order. The original invoice will be sent to DTC within 3 working days after shipment.
Hope these above actions will fulfill your requirement.
If you have any question please feel free to ask us.