I did this back in 2019 sending a lovely memento to my now wife, in September it hadn't come through the postbox so thought it must have been lost in the post. Randomly, one afternoon walking down our street together to get an early evening cider, the missus looked down, saw a Glasto postcard on the pavement, picked it up to give it to whatever house it was supposed to go to, only to find my half cut scrawl on the back!