I've recently entertained the suggestion of including a stamped, self-addressed thank you note with gifts. When did it become acceptable to not acknowledge a gift? The person doing the gifting, not only sent a gift, they invested their finances for the gift,but their time in the thought of what to give and the time it took to shop, wrap and deliver. Why not have the courtesy to say thanks? Too, as in taking a gift to a wedding reception or a shower, perhaps the card from you was misplaced and they don't know who sent it. A check in the mail may have been lost. Having the SASE would let you know that your gift was received. It's tacky but so is neglecting to say Thank You.