Need ED for job work material

Dear Sir,

We have a scenario like, we are sending material to Vendor for job work and he is sending back the same material without adding any materials in it but he is collecting Excise Duty as well as service charge. Now for service charge I will rise service P.O and for excise duty I will rise ordinary P.O. but at the time of GRN and MIRO transaction material value should not flow, only Excise duty to be posted in MRO transaction. Please provide your suggestions.

Thanks,

Manoj