Gujarat High Court Criminal Manual (subordinate court practice), 1977
(1) Every affidavit signed in the presence of any Officer (authorised to administer an oath) by a person not known to such Officer, should be attested in presence by a person known and identifying the declarant before him, e.g. a lawyer or lawyer's clerk, etc. The Officer administering the oath should add the following words after the words "solemnly affirmed before me", namely, "by.... who is identified before me by.......whom I personally know." (2) The Metropolitan Magistrates, Judicial Magistrates or Officer appointed as Commissioner of Oaths and authorised to administer oath should not accept the identification of the declarant by the pleader or any person identifying the declarant unless such pleader or person also certifies under his own hand that the declarant whom he is identifying is personally known to him.