Isn't it frustrating, when you don't think of what you should have said, or done, until years later?
About four years ago I was surprised to get a graduation notice from a shirttail relative I had never spoken to. Nonetheless, I got a graduation congratulations card and mailed off a hefty check. Expected to receive a thank-you. Expected in vain.
The check cleared my bank account.
I wish now, belatedly, that I had added a note to the congratulations specifically asking what the graduate intended to do, what kind of career was envisioned, what were the future plans. I should have been quite precise, asked the graduate to WRITE ME A NOTE, giving me answers to my questions.
I wish I'd thought of that sooner.