Import of free samples

Dear Consultants,

my client is getting free samples of one imported material. In this case <b>no payment will be made to vendor</b> but we have to <b>pay all the import</b> <b>duties</b> to the customs like Basic duty of custom, Ecess, Hcess, CVD, ADC , etc etc,

How we can handle and configure this scenario in sap where we donot make payment to vendor as he has provided us the free goods but we have to make payment of custom duties.

with regards