CPE (Certificate of Proficiency in English) is now referred to as C2 Proficiency. It constitutes an official certification of knowledge of the English language at C2 level as outlined by the Common European Framework of Reference (CEFR).
It proves the students’ ability to use the English language at an exceptional level. It can be computer or paper-based and it is officially recognized in Greece.
The examination is held twice a year and it tests all four language skills: Listening, Writing, Speaking, Reading.
For more information you can visit the official site:
https://www.cambridgeenglish.org/exams-and-tests/proficiency/