During the application process the TTB asks for the following information
TRANSFER IN BOND
If you will receive bulk spirits and/or denatured spirits in bond from another domestic distilled spirits plant or alcohol fuel producer you must complete this section, even if you are not required to obtain a bond. If you are bonded, you are responsible for ensuring that the liability on all spirits and denatured spirits 'on hand' and 'in transit' will not exceed your bond coverage. Select "Add a Row" to identify each such supplier.
Once approved, a transfer in bond form will be attached to your application. You should supply a copy to the supplier(s) transferring the spirits to you.
I am planning to purchase spirits from other producers for flavoring and bottling. Does this mean that they want me to 'place an order' with a distributor of bulk spirits, let them know I cannot have it until I provide the form, just so that I can get the applicable information? (Serial Number of order, registry number of shipper, etc)