I have written a thank you card for a thoughtful gift that I recently received. The gift is from my boyfriend's boss's wife whom I have never met. It turns out that I will meet her at a party before I mail the card. Is it inappropriate to hand her the card when I meet her?

Since you have never met her before I would say mail it. It is more formal that way.

If she was a close friend I would not see a problem with handing it to her.

Thank you Tuscany!