The essential mission of the Office national de garantie des séjours linguistiques et éducatifs is the implementation and control of a demanding and controlled quality approach, symbolised by the "Quality Contract of the Office". 38 organisations are currently members of the Office. The language study and educational stay organisations that have received the Office's label undertake to comply with quality criteria relating to prior information given before departure, the smooth running of the stay, the quality of teaching, complementary cultural and sporting activities, supervision and accommodation.
Unique in France, the Office is a joint professional and institutional grouping: language and educational travel organisations and language schools, parents' federations, foreign tourist offices, organisations involved in language teaching and tourism, such as the CIDJ, Unat, Cambridge English, etc.
The Office is a member of FELCA's EDVs and a founding member of ALTO (Association of Language Travel Organisations).