In an English context, regarding a traditional formal wedding, the invitation for the wedding, is sent out to the guests by the parents of the bride, and would follow the following kind of wording.
Mr and Mrs Harry Blain of 16 Gough Lane, London, request the pleasure of company of Mr and Mrs John Smith at the reception, on the occasion of the marriage of their eldest daughter, Mary Elizabeth Blain to James Percival Brown, youngest Son of Mr and Mrs Ian Douglas Brown of Chancellor Lane, Bath.
Marriage ceremony at St Albans Church, at 4pm followed by the reception at the George V1th room at Claridges hotel at 6pm.
Dress: Morning suit
RSPV by 4th april, to 20 4567823.
No children please.
An informal wedding invitation, can be sent out by the couple themselves, and is often the case for a second marriage. This may simply say:
Please join us on the happy occasion of our marriage at the registry office in London, at 11am, and then later at the reception in the Savoy room in Dorset hotel, for a lunch party.
Dress: Smart casual.
RSPV: Suzie at 02045673