Yıldız Teknik Üniversitesi (Yildiz Technical University) offers an online verification service in Turkish at https://mezuniyetbilgisi.yildiz.edu.tr/.
Enter the T.C. Kimlik No (Turkish ID Number) from the back of the diploma or from the transcript, as well as the verification code in the shaded box.
The results include the student's name, student ID, deptartment and faculty, date of enrollment, date of graduation, Turkish ID number, father's name, and place and date of birth.
The results can be printed in Turkish. If you use the auto-translate feature of Google Chrome to translate into English, they can also be printed in English.