A framed certificate in the Protagonist's House in Fallout 4.
Can be seen on a bookshelf near the hallway.
Diploma reads:
"Suffolk County School of Law
Boston, Massachusetts"
The diploma presumably belongs to Nora, which indicates that she is a lawyer. The books around the diploma appear to be law books.
Next to the diploma, there is a display case with a Veteran Flag, presumably Nate's.