Two investigative news portals, Cobrapost.Com and Gulail.Com had claimed on November 15 that Shah had ordered illegal surveillance of a woman at the behest of one "Saheb".
They had released taped conversations between Shah and IPS officer G L Singhal to support their claim, but said that its authenticity could not be confirmed.
"I am completing legal formalities. I cannot divulge any details at this time about my stand on the issue," Sharma told PTI.
A 1984 batch IAS officer, Sharma faces five criminal cases, including a case of alleged irregularity in land allotment to private firms in Kutch district in 2008.
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He last served as Bhavnagar Municipal Commissioner, before being arrested on January 6, 2010, in a case involving alleged irregularities during Kutch earthquake rehabilitation.
He is out on bail now.
Meanwhile, BJP leader and former Gujarat health minister Jaynarayan Vyas said when news portals themselves said that the authencity of tapes could not be verified, there does not arise any question of a debate.