My daughter was married a few weeks ago and two of my cousins attended the wedding. After going through all of their gifts she told me my two cousins did not give a gift or an envelope. She wants to send out thank you notes and wants to make sure an envelope at the reception (from the cousins) was not lost or stolen. If they truly did not give a gift, she won't write a thank you note but how can we tell if it were stolen or lost? She doesn't want to put them on the spot by asking.