108 connection with this case are all relied upon by this court as they are proper and identified by the witnesses who prepared it and there are corroboration in between the witnesses thus the certificates as issued by P.W. 1 and P.W. 12 at the later stage is not at all fatal to the prosecution case. The Ld. Lawyer for the accused at the time of argument referred citation Kundan Singh vs State and (2015) 1 Cal LT 318 and on perusal of the said citation this court finds that it is not applicable in this case. As per the mandate of section 47 of Indian Evidence Act which states that, Opinion as to handwriting, when relevant — “When the Court has to form an opinion as to the person by whom any document was written or signed, the opinion of any person acquainted with the handwriting of the person by whom it is supposed to be written or signed that it was or was not written or signed by that person, is a relevant fact.” In this present case P.W. 11 in his examination in chief that, “in my presence from our cell S.I. Jyotirmoy Biswas also signed into it as a witness” and further stated that, “I know the handwriting and signature of Jyotirmoy Biswas”. P.W. 18 stated in his examination in chief that, “This is the signature of Jyotirmoy Biswas who works in our Cell and I know his handwriting and signature”. The P.W. 9 stated in his examination in chief that, “I know the handwriting and signature of Jyotirmoy Biswas who works in the Cyber Cell, C.I.D.” P.W. 6 stated in his examination in chief that, “This is the signature of Sukanta Roy in the D.V.D. and he had signed in my presence and I know the signature and handwriting of Sukanta Roy and this is the said signature of Sukanta Roy”. Further, though the name of Uttam Dolui being the seizure witness and his signature was proved by the P.W. 10 who has stated in his examination in chief that “This is the said paper which is the seizure list containing two pages which was translated to me in Bengali and after understanding its content my friend and I put our signatures thereon and this is my signature along with date in the last page and this is the signature and date of my friend Uttam Dolui and I know the handwriting of my friend Uttam Dolui”. Ld. Special PP at the time of argument relied a citation reported in (2012) 3 Supreme Court Cases (Cri) 18 where it was held that