3 The First Respondent, who is a merchant exporter, filed two rebate claims in the office of the Assistant Commissioner of Central Excise (Rebate), Mumbai-I, in the amount of 1,07,989/- and 2,19,109/- in respect of duty alleged to have been paid on goods manufactured by two firms by the name of Jai Krishna Prints and Jai Santoshi Tex Prints. The goods were exported through the port of Mumbai. On a scrutiny of the claims, the Department claims to have noticed that the First Respondent had submitted duty paying certificates in loose/open condition. A reference was accordingly made to the jurisdictional Central Excise authority at Surat. The Range Superintendent in the Commissionerate at Surat reported by his communication dated 10 February 2006 that the processor (Jai Krishna Prints) had taken Cenvat credit on the basis of invoices of a grey material supplier, Ganpati Textile, Surat. An alert circular had been issued by the Commissioner of Central Excise at Surat on 22 September 2005 pointing out that as many as 71 firms, including Ganpati Textile, were non-existent and bogus. A notice to show cause