This is the most commonly known type of Air to Air cargo and which is the implementation of bilateral or multilateral traffic agreement between air cargo carriers at this case it is defined as in transit cargo,
Shipment will be transferred at a point from a carrier to another as agreed upon.
The other Air to air service is when a traffic agreement between two carriers doesn't exist.
In this case another process should take place at the transit airport in order to resend goods to its final destination as an export cargo.
Required documents are basically consist of :
a) Packing list.
b) Goods invoice.
c) Shipper and Consignee details.
d) In some special cargo commodities more documents are required to be
submitted within transaction file as to comply with rules and
regulations of the processing authorities.