Many universities require that your native language be English or you will have to submit proof of language proficiency.
Usually if you lie and say English is your native language while all other evidence shows otherwise (e.g. country of birth, country of citizenship, university degree language, etc.), universities will likely suspect that you are lying.
However, suppose my native language is not English but I can read, write, listen, speak as fluently as a native speaker. If I satisfy one or more conditions below, do universities have any reason to suspect that English is not my native language?
I am a citizen of a country where English is the official language (though I may not be born / living there)
I graduated from a university where English is the official language