"Official recognition" means the acknowledgement or approval given by someone in a position of authority to validate or acknowledge the existence, importance, or legitimacy of someone or something. Full definition
For example, it is great progress that academically there is official recognition of the importance of the study of women's historical, literary, and cultural experience and work. (religion-online.org)
As a replacement for this, official recognition for those medical assistants is offered through private institutions and other organizations. (medicalassistanttrainings.com)
That periodic table poster on your wall is about to be out of date, thanks to four new chemical elements that just received official recognition. (sciencemag.org)