I grew up being taught to send thank you notes, but not
all the time. If I opened the gift and thanked the person giving it in person, I didn't send a thank you note. However, if a relative sent a gift then I would send a thank you note. Christmas gifts didn't get thank you notes, I think because they were almost always reciprocal. When I graduated high school and college I sent a thank you note to each person whether or not I thanked them in person. As an adult I don't get birthday gifts from anyone except from FI and maybe my parents on occasion, and Christmas gifts are almost always reciprocal, so until I started wedding planning I'd been really lax on thank you notes for gift giving. With wedding related things, everything given to us gets a thank you note.
I also realize the purpose of thank you notes more. I sent a cousin a new baby present. My tracking number says the package got there and I know she has the difficulty of a new baby and all, but I don't
really know if she has received it because I haven't heard from her at all. A thank you note addresses that practical side of things as well as making the gift giver feel appreciated. I probably won't continue to send presents for her son because of the lack of a thank you.
This is the first year that I'll be spending Christmas with FI's family, so if a change is warranted in my thank you note etiquette now is the time to do it. What should I actually be doing and what is the best etiquette to teach my own kids when I have them?