DELF

DELF is an official diploma offered by the French Ministry of Education.
DELF comes in 4 levels corresponding to the 4 levels of the CEFR (Common European Framework of Reference for Languages):
DELF A1, DELF A2, DELF B1 and DELF B2.
DELF diplomas (Diplôme d’Etudes en Langue Française) have a lifetime validity; they do not expire.