Sent the wrong material to our customer

HI 

  We sent the wrong material to our customer  then we decided to return back to material form our customer , for bring that  material  what are the documents required and explain the  consequences during transit if GST authority will  catch the material .

I. Credit note given form us with E way bill 

2. Debit note from our customer  with E way bill ( our customer refuse to provide debit not because he is not able to take the material in )

3 .He agree to  provide Delivery challan  

Note: we sent the material E-invoice through e invoice 

Regards

Ayyappan M