If it is from a house guest who attended a party or social function I've hosted, it is a much appreciated expression of gratitude and may end up temporarily on the fridge especially if there's witty quip or cool-looking stationery.<p>If it is from an elderly relative or child under 10 years old, it is appreciated as a quaint old-fashioned gesture: awww isn't that cute! It goes on the fridge.<p>If it is from a job candidate who I've just interviewed? I will assume it was from a hapless out-of-touch person who took out-of-date job-interview advice uncritically and verbatim. It raises a small red-flag for awkwardness. It goes in the shredder.