Input as such clearance which supplied by non assessee

Non Assessee Supplied us Excisasble Inputs under Commercial Invoice instead of Excise Invoice. If we want to remove said Inputs from our factory under INPUTS AS SUCH CLEAREANCE then How to clear?

1) Should issuance of Excise Invoice?

2) Excise to be charged?

3) If  No excise duty will be charged then What Matter / Language  will Write at Excise duty portion in Invoice?

Please reply.... Thanks

sujit Naha