Informal invitations, acceptances, and regrets are simply friendly notes written always in the first person. They vary in form to suit the occasion. They should be cordial in tone, but brief, and are in better taste when confined to the subject of the invitation, outside items being permissible only under special circumstances which may require their mention.
An informal invitation should never, under any circumstances, be answered in the third person.
Invitation:—
30 Rampart St.,
May 4th, 1917.
Dear Mr. Brooks:
We would be very pleased to have you dine with us on Monday next, the 12th, at seven o’clock, if disengaged.
Cordially yours,
Helen Clements.
Acceptance:
Eastern Point,