When the Scrymgeour Building is open, but the library is closed, loans may be returned via a book drop in the Level 2 foyer adjacent to the library entrance.
When the College is open, but the library is closed, loans may be returned via a book drop situated outside the library on Level 4 of the Matthew Building.
When Ninewells Library is closed, loans may be returned via a book drop situated on Level 7 adjacent to the library entrance.