I received an email from a bride about to address her wedding invitation envelopes and she wanted to know when to use Miss vs. Ms. for single female guests.
I told her that she should use Miss for anyone under 18 or 21 and Ms. for anyone older. If the single female guest is a widow you should use Mrs. as in Mrs. John Smith.
Since I'm sure she's not the only bride with this question I thought I'd share it with all of you.
