My Dd recently had her 18th and she got lots of cards with money in given to her and send to her. Really lovely.
I expected her to be texting people herself to say thank you (I don't even know everything she was sent as I am out when the post comes).
i've just had a text from an Aunt to ask if the card and money she sent arrived safely. When I have questioned her about it, there's a couple of other people, she hasn't texted to say thank you. When she was younger, I have obviously been the one to send texts to say thank you but at 18 surely she should be doing this herself.