ARM(Advance Return management )- serial Number of Material.

Hi

In ARM(Advance return management ) , I configured ARM For FERT Non valuated Material type , Senerio is working Fine ,

(senerio : Return Po With NB2 Dcoument type --> VL10B(shipping document )-->VL02(Out Bound delivery)-.

Replacement process: System automaticalley created Replacement po with document type : NB--> Automatically inbound delivery created -->GR W.R.T Inbound delivery ) -> so The return & Replacement process completed.

But here My client Requirment Is,

In Same plant thier Activated Serial number For materials (FERT ) Type  , In these Where The serial Number Recorded in Return Po  & Replacement  Po .

Can any body help me .

Thanks

Hari