Complication if export exciseable goods

Hello Experts,

Some mistake occur by my client, They export exciseable goods without payment of duty to NEPZ in same state against CT 3. my client has get ARE 1 and CT 3. but their range office said this is mitake create complications, because my client has not obtain LUT/Bond from excise or neither intimate to range office before exports. what is any remedy available ? if any solution you have please guide me.I shall grate full you.

Thanks & Regards

Prem