Govt. Deptt. generate E-invoice and take payment within 15 days. After payment in next 15 days they handover material. At the time of giving material they issue a material issue Note and E way Bill. There is NO Invoice with material during transportation . GST persons say there should be Invoice with material. WHO is Right ? Can we issue invoice prior to despatch of material. ? Should we give This invoice alongwith E way bill on the Date the material is transported ? In that case Date of Invoice & Date of E way bill will mismatch.