When 'Vera Brandon' (Nancy Kelly) returns to the room she rented as Mrs. JA Williams, there's a nameplate on the door that indicates the same. However, when she opens the door to enter the room, the nameplate is no longer there.
When Mrs. Henderson goes to visit the first people listed in Vera Brandon's book, she doesn't introduce herself by name; but the mother says for her baby to wave "Bye, bye, Mrs. Henderson."