The petitioner is a dealer registered with the Deputy Commercial Tax Officer, Palakarai – I Assessment Circle, Trichy/first respondent herein. The petitioner is engaged in civil construction. The assessment years pertain to 2004-2005 and 20052006. The petitioner claims that when they were executing their project work, they had engaged the service of one M/s.Thasami Builders (P) Ltd., Coimbatore. The case of the petitioner is that as per Section 3-B(2)(d) of Tamil Nadu General Sales Tax Act, 1959, they are entitled to deduct the amount paid to the said contractors. But then, that is subject to certain terms. The said contractor must be a registered dealer and they must have reflected the transactions with the petitioner in their returns and also paid the tax thereon. Only if these conditions set out in the Act are fulfilled, deduction can be made by the petitioner herein. Claiming that all the statutory formalities have been fulfilled, the petitioner filed their return. Thereafter, the petitioner received pre-revision notice dated 30.03.2007 from the first respondent. The petitioner offered their explanation and also produced two certificates from the Commercial Tax Officer, Trichy Road Circle, Coimbatore. But the certificates produced by the petitioner, according to the first respondent, were not sufficient. Therefore, the first respondent wrote a letter bearing No.TNGST 3521406/04-05 dated 06.11.2007 calling upon the Commercial Tax Officer, Trichy Road Circle, Coimbatore, to verify the statement made by the petitioner herein. It appears that no response was received from the second respondent herein. Therefore, the impugned orders dated 17.07.2009 came to be passed. They are assailed in these writ petitions.