The Swiss franc slipped against the dollar on Monday, moving in tandem with the euro which dipped after an offer by Italian Prime Minister Mario Monti to resign renewed concern about the euro zone's debt crisis. The franc fell 0.2 percent against the dollar to trade at 0.9359 by 0718 GMT compared to the New York close. The franc rose 0.1 percent against the euro to trade at 1.2074.