PETITIONS under Article 226 of The Constitution of India praying for the issuance of Writs of Certiorarified Mandamus (i) to call for the records of the second respondent herein relating to the impugned final notice in Ref. No.Ma.A9/Va.Thu.Na.Ka.No.R-1/DN-117/2018 dated 01.3.2018 and the impugned warrant of attachment dated 22.3.2018 in Ref.No.Ma.A9/VA.Thu. Na.Ka.No.R-1/DN-117/44/ 2018 both issued by 2nd respondent in respect of property in Old Door No.56/2 corresponding to New Door No.14/2, Giri Road, T.Nagar, Chennai17, quash the same and consequently direct respondents 1 and 2 to consider the representations submitted by the petitioners on 23.7.2012, 01.8.2012, 08.2.2015, 21.7.2015 and 21.8.2015 seeking re-fixation of property tax on residential basis to the property in Old Door No.56/2 corresponding to New Door No.14/2, Giri Road, T.Nagar, Chennai-17 on merits with retrospective effect (WP. No.7847 of 2018) and (ii) to call for the records of the 2nd respondent herein relating to the impugned final notice in Ref.No.Ma.A-9/Va.Thu.Na.Ka.No.R-1/DN-117/2018 dated 01.3.2018 and the impugned warrant of attachment dated 22.3.2018 in Ref.No.Ma.A-9/VA.Thu.Na.Ka.No.R-1/DN-117/43/2018 both issued by 2nd respondent in respect of property in Old Door No.56/1 corresponding to New Door No.14/1, Giri Road, T.Nagar, Chennai17, quash the same and consequently direct respondents 1 and 2 to consider the representations submitted by the petitioners on