I always sent to my grandchildren and i always had to ask 'did you receive the parcel'? as they never let me know. Then when my grandson was 18 I sent a cheque and card, I did not receive any acknowledgement at all, so I wrote to him and said ' I know you received it because the cheque has been cashed, but as you can't be bothered to say thank you I can't be bothered to send anything else', that was 8 years ago and I have not sent anything since, not for Christmas or birthday. My granddaughter from my other son, she is now 11, has always written and posted a thank you , obviously she still gets gifts.