Those whose repentance is accepted:

They are those who repent after committing sins unknowingly and Allah Ta'ala accepts their repentance. Also, those who accept repentance are those who correct themselves by refraining from sinful deeds and perform good deeds after believing. They fear Allah Ta'ala without seeing Him, they are pious, they sacrifice their lives for the cause of Allah, they give alms in the way of Allah

Properly following the Prophet (peace be upon him), forgiving people's mistakes, always speaking the truth, and those who avoid all kinds of sins