French phrase
Je suis déjà passé par ~.
Meaning
I've already taken care of ___.
When to use it
It states that a procedure is already complete. It is neutral and can reassure the listener.
Example dialogue
Tu as fait la demande de visa ?
Did you apply for the visa?
Je suis déjà passé par le bureau des visas.
I've already taken care of it at the visa office.