Conne, to be honest, lots of people don't these days, and I don't like it any more than you do. It's very rare for the younger generation to thank us for Christmas or birthday presents, even though they see us in person. Over hthe years we've given engagement presents, wedding presents, new baby presents - not a word, so we don't even know without asking that the things have arrived. This is tbh one reason why we have stopped sending gifts to some people at all, they get a card, nothing more.