The phrase "mutual invitation" is correct and usable in written English.
It is an expression that refers to an invitation extended and accepted between two or more parties. For example: We both agreed to attend the event after exchanging a mutual invitation.
Immediately smitten by Ms. Turner, he wrangled an invitation from a mutual friend to a group outing the following week.
Within hours of the announcement, the Investment Company Institute, a trade association for mutual fund companies, sent out invitations to a fund-raiser for Mr. Becerra prominently citing his role on the panel.
Through a mutual friend, Mr. Loeffler wangled an invitation to go hiking with the writer on the north rim of the Grand Canyon.
He deflected the invitation; it seemed our mistrust was mutual.
A new mutual security pact -- or even a formal invitation from the Iraqi authorities to the American-led military forces to remain -- may quiet Washington's critics in the Arab world and around the globe, officials said.
On Wednesday against a backdrop of mutual suspicion, Sheik Salman flys to Moscow at the invitation of the Russian foreign ministry in a bid to bring pressure to bear on the ruling family.
I received an invitation to a holiday party from a mutual friend.
Pope Benedict later apologized for the reaction, explaining that the totality of his address was intended as "an invitation to frank and sincere dialogue, with mutual respect," with the Muslim world.
I hope this serves to appease hearts and to clarify the true meaning of my address, which in its totality was and is an invitation to frank and sincere dialogue, with mutual respect".
I found out through our mutual close friend that I hadn't received an invitation because we hadn't seen each other in the last year".
