What is the etiquette for RSVPing to a wedding invitation?

Short answer

Reply as soon as you can, ideally within a few days of receiving the invitation. Use the method given, whether that is a card, email or wedding website. Always reply by the date stated, and never assume you can bring a guest unless it is specified.

The golden rule is to reply promptly. As soon as you receive the invitation, check the RSVP date and respond before it. This helps the couple finalise numbers with the venue and caterers. If you cannot attend, still reply, because the couple needs to know either way.

Use the method the couple has provided. If they sent a printed card, fill it in and post it back. If they gave an email address or a wedding website, use that. Do not text or call unless you are unsure. If you need to ask a question, contact the couple or the person named on the invitation.

Only RSVP for yourself and anyone explicitly named on the envelope. If you are invited with a partner, their name will usually be included. If you are unsure, ask before adding a guest. If you have dietary requirements or access needs, mention them on your reply. If your plans change after you have replied, tell the couple as soon as possible, even if it is after the deadline.