German phrase
Wo muss ~ unterschrieben sein?
Meaning
Where does ___ need to be signed?
When to use it
Asks where to sign. It is common for official forms and sounds administrative.
Example dialogue
Wo muss das Visumsformular unterschrieben sein?
Where does the visa form need to be signed?
Unten auf Seite 2, neben dem Datum.
At the bottom of page 2, next to the date.