I usually use just a few dabs of royal icing on either end of the ribbon to ‘glue’ the ends at the back ~ if the ribbon is tight enough around the cake, it’s never budged for me, and I usually have a bumpy long drive for most deliveries. Works like a charm. Super easy for the client to remove too, especially for wedding cakes, and if you’re applying it to a well-hardened fondant covered cake, the cake still looks nice when you remove the ribbon. Although I love the idea I just read above of wetting the ribbon ~ I bet it would hold great! But how is it to remove?