Returning of Rejected Material (Line Rejection)

Dear Sir,

We hava a following business scenario :

We made a PO and done the GR . Subsequently Inspection lot was also accpted and UD also done . The MIRO was also made . Subsequently Material was issued to a Production Order .

During the operation , it was found that Material has some problem and need to be rejected .

Kindly guide us as what steps need to be followed to send back the Material to Vendor .

Pl help us .

Rgds

B Mittal