Hi!<br/><br/>is the following sentence (especially the underlined part) correct from the grammatical standpoint?<br/><br/><i>I certify the authenticity of signature of translator NAME, SURNAME, personal identity number XXX-XXXX.</i><br/><br/>Can you "certify the authenticity of something" or should it be "I certify that the signature of ...."<br/><br/>Thank you!