If the wedding invitations or save-the-dates have already been sent, you do need to send an announcement as soon as possible. You can do this either by mail or by phone, whichever you prefer. Be brief and to the point. No explanation is warranted. Although mailing a card might be more time consuming and expensive, it will save you the awkwardness of any questions that people may naturally ask. The easiest method is to simply have a printed single card made up that states that the wedding has been cancelled.
about the authorSarah has been editing the blog at mywedding for four years. She enjoys watching classic movies, spending money on eyeliner that she never wears, and convincing brides to write thank you notes.