A friend of mine just sent us an invite to his wedding. The RSVP says "the favour of your reply is requested by MM DD, YYYY". But there's nothing else on it.
What should we do? Take a picture of ourselves holding up a sign saying "Yes!" Write a nice note? Turn it into a puzzle for them to solve? It feels silly to let this chance for hijinks go to waste ....
... or maybe ettiquette says there's a specific thing we're supposed to do with it?

1st year anniversary in Victoria with a killer whale topiary!