We have two children, and by my first marriage a son who was very young when we married and was therefore brought up solely by us. His father did his once a year holiday, but there was no routine or regular contact. He is now deceased. My husbands two were much older and emigrated with their mother n step father just after we were married. We get on well and visit regularly.
The background is important to this issue!!
We now have 5 grandchildren with a sixth due next April, so the three UK siblings will have two each. The two children in America are married to English spouses (which in no doubt helps the contact across the pond), however they elected not to have any children.
Presents were sent the first year of the grandchildrens arrival, but as my son did not e mail to say thank you, they are not sent to their children anymore. Which he has not commented on, he may not even be aware of but it makes it awkward for us, as the Amerucan presents are often very cherished gifts, as they are different and reflect the culture, which if it isn't here already soon will be! The eldest GC is 4, but as they grow I wonder what my sons two will think. For balance their mum is Canadian, so they get presents from her sister n parents. BUT not at Christmas, they are brought over on their annual visit. My son, would give up giving n receiving Christmas presents like a shot, they are comfortably off and see it as a marketing ploy whilst his wife's family are token present givers.
Personally I love cards from my nephews children via their mum, my older nephew sent e mail thank you, which was just that- thank you, not news of school, activities etc.
But I think a thank you is required, no matter what the method. Our three always make a card (with parents help) to say thank you even though normally we are together for Christmas and birthdays.
So I would presume like my stepdaughter no acknowledgement means, thank you ---but don't!
Families eh- how do we survive the minefield!?