Finding a lost invitation
Getting your link back without asking anybody.
Go to the couple's website and press RSVP. Without your own link that takes you to a page headed Find your invitation: put in your name, and the link is emailed to the address the couple has for you.
It is sent, never shown. The page does not tell you whether it found you and puts nothing on screen — otherwise anybody who could guess your name could open your household's replies and read what you cannot eat.
So if nothing arrives, they may have no address for you or a different one. Ask them directly: they can see who is on the list, and we will not tell you.