The importer does not make any documentation, documentation has to be made by the exporter, importer visit has bank pay the amount and collect the documentation from his bank, after collection of documentation, the importer will approach CHA and provide all docs set to him, CHA will file "Bill of Entry"(importer will pay duty) and transportation co. will bring those goods from port to his doorstep. CHA will make all arrangements for it.
In case of courier import via air, no need to approach CHA, all formalities would be done by the courier company and you will receive your cargo.