Update

The post office wouldn't (or no longer does allow) me put the delivery confirmation on a regular first class envelope, and would only do it in one of those large priority envelopes. Who gets Christmas cards in priority mail? So it is just regular mail again. I won't know if she got it unless she contacts us. I feel so strongly in my gut that I want it to look like an old friend sending a holiday card in case family gets it instead of her so that her privacy is protected.

Oh well.