It’s always in good taste to send a hand-written thank you note... And sometimes it’s a necessity.
According to the Emily Post institute, the rule of thumb is that you should send a written note any time you receive a gift and the giver wasn’t there to be thanked in person.
You can also email or call a close friend or relative to thank them, if it’s not for a wedding gift.
As for wedding gifts, each one should be acknowledged with a written note, and you have three months to do it. But the sooner you can send it, the better.
Even if you thanked the giver in person, a note is still a must. Same goes for shower gifts.
If you received a gift or card as a congratulations, the rule is to send a note in return.
Gifts received during an illness should be acknowledged with a thank you note when the person is feeling well enough to send one. Here, a phone call or personal email works too.
Finally, with condolence gifts, everyone who sent a note, flowers or donation should receive a written thank you.