Invitations to official functions are usually issued on a card, which may be engraved in script from a copper plate or printed in script or Roman type. They are usually about W6 x H4. inches (15 x 11 cm) in size, or slightly larger.
The invitation should make clear the following:
- The nature of the function
- Where the function is to be held
- The date of the function
- The time of the function and, if desired, the time it will end
An invitation to an official function should be addressed only to the guest invited in their own right if sent to their official address, even if their partner is invited. They are given their full prefix, title, rank and decorations, as for a formal letter.
Note that, traditionally, invitations to a married couple, when sent to their home address, are addressed to the wife alone, with both names being inscribed on the invitation card. It has become increasingly acceptable, however, to address the envelope with both names.
Additional information or instructions, for example, relating to car parking, are best given on a separate sheet sent with the invitation or with the admission card.