ごgoぞん存zonじjiごgoぞんじ存知zonjiごぞんじ御存知gozonji
1.
A phrase expressing acknowledgment of someone's familiarity or awareness of a person, thing, or situation.
2.
A polite expression used to inquire whether someone is aware of a particular fact or piece of information.
3.
A respectful way to refer to someone’s knowledge or understanding regarding a topic or individual.
Example:
ご存知だとは思いますが、クオーターしかつかえませんよ。