"I will give them an official invitation to do these things," he said, with a meaningful look.

Everyone said they would think about it and give me a response when they received the official invitation.

"If they send an official invitation, then I will think about details," she said.

"Now that you've had an official invitation, will you accept?"

Each visitor to Russia is required to have an official invitation to visit from a sponsor within the country.

The only difference will be the cost of the necessary support documents - ie the official invitation.

You'll be receiving an official invitation once we return home.

Such official invitations call into question America's commitment to recognize only one China.

So it seems to me that distant civility is the thing: official invitations, no more.

Parliament will receive an official invitation to this seminar in late March.