shipment & customer document

Dear Friends

Please provide some information on the below points & how to proceed in SAP? did any Enhancement is required ? or any standard transaction is there ?

1) Shipment and Customs documents need to be created in order to be able to physically ship goods to the consignees

2) Customs documents are required for cross border flows (for replenishment and DIs flows as well as for local flows (delivery to travel retail or to overseas territories)).

3 ) Shipment documents are required each time there is a shipment (cross border or local delivery)

Regards

Prakash