地道的表达应该是Thisistocertify(或declare,state,evidence)或weherebycertify!

　　举例：

　　CET-6大学英语考试六级证书CertificateofCollegeEnglishTestThisistocertifythat___________,astudentofGrade______atDepartmentof__________,___________University/Institute,passedtheexaminationofCollegeEnglishTestBand-6（CET-6）inJanuary/JuneXXXX.Uponexamination,he/shehasfulfilledtheband6requirementsCollegeEnglishSyllabusBandSixwithexcellent/qualifiedscoreandisherebyawardedtheCertificateofCET-6.DepartmentofHigherEducationStateEducationCommission（国家教委）或MinistryofEducation（教育部）DateofIssuance:CertificateNo.: