Sending Out Invitations
It is wise to send invitations as early as possible. While a quiet, intimate dinner among close friends may be arranged over the telephone at short notice, the more formal a gathering, and the more people being invited, the more advisable it is to give advance warning.
Giving notice of a minimum of six weeks before the event should ensure that most people are not already booked up. It will also give guests ample time to reply and provide the hosts with preparation time in abundance.
If an invitation is extended and accepted verbally, for example, by telephone, it should be confirmed by an invitation card on which 'R.S.V.P.' has been deleted and 'To remind' or 'Pour mémoire' substituted. In this case there is no need for acknowledgement.