The only ground, on which the assessment order, passed five years before the writ petition, was filed is questioned is that a copy of the assessment order was not served on the petitioner; and the conditions stipulated in Rule 58 of the Andhra Pradesh General Sales Tax Rules, 1957 (for short “the APGST Rules”) have not been complied with. The petitioner has, admittedly, closed his business in August, 2000 itself. Rule 53(a) of the APGST Rules stipulates that, if any dealer discontinues the whole or any part of the business carried on by him, he shall inform the fact to the assessing authority concerned within 30 days thereafter. The petitioner has, admittedly, not intimated the respondent-assessing authority of the fact that they had discontinued their business, nor did they intimate the assessing authority of the address to which notices or summons should be sent. In the counter affidavit, the respondent states that the notice was served by affixture on the premises where the petitioner had hitherto carried on business as a dealer.