Although English speakers normally use first names far more often and more quickly than Germans, there are occasions where it’s better to stay with last names and titles.
With men this is easy. There’s only one title and it’s Mr. However, with women it gets more complicated because there are three possibilities: Miss, Mrs. and Ms.
Use Miss for unmarried women. Many Germans are hesitant to use Miss because it translates to Fräulein, which no German with any common sense would use with an adult woman. (For non-Germans reading this, the word Fräulein is reserved for little girls only.) However, Miss is used in English and some young, unmarried women prefer to be called by it.
Use Mrs. for married women only. Again, some women prefer this title as it clearly shows they are married.
The title Ms. is used for married and unmarried women alike and is the equivalent of the German Frau. If you’re unsure of how to address a particular woman, you’re always safe using Ms.

