the stamp of the issuing institution or notary public
the name and address or provider/registration number (where applicable) of the certifying officer. This must be printed legibly (able to read) below the signature or in the stamp. It must be possible for University Admissions in Sweden to contact the certifying officer if necessary. A stamp stating only "True copy certified" will not be accepted. 这是说什么，像成绩单这些东西，先要签字然后盖章？还要写地址？