My son rarely sends cards - he is a Yorkshire Aussie. He sends lovely presents though - sometimes when it isn't your birthday or Christmas. I am not sure you can make people care and GCs are another step away, aren't they. I think I would just say (probably would have done at 21) that you understand where he is coming from you look forward to having a meal with him when you see him but will stop the Christmas and Birthday presents as he suggested.
A thread for people who have been on GN a long time



