you note instead will help you to express your feelings for them. thus using a thank you note for your friends and family is very effective to show them how grateful you are to them. if they can pull out time from their busy schedule to wish you on your special occasion then to the least you can make an effort to thank them with your appreciation with a thank you note. sometimes a mere word is not enough to express how grateful you are, for such purposes a thank you note will help a lot to express yourself to your loved ones about how much they mean to you 