RSVP is an initialism derived from the French phrase "Répondez sil vous plaît," which means "Respond, if you please," or just "Please respond," to require confirmation of an invitation. It is often used to confirm attendance for an event, such as a wedding, birthday party, or baby shower. The phrase "RSVP, regrets only" or "Regrets only" is a popular modern variation that implies "if you do not reply, that will be taken as an acceptance". It is bad form to cancel an RSVP, with exceptions including illness or a death in your family. The RSVP should make it clear who is invited, and it is usually expected to respond by a certain date.