This paper draws attention to a fundamental problem for a version of the tracing strategy defended by a number of theorists in the current literature (Rosen in Philos Perspect 18(1):295-313, 2004; Fischer and Tognazzini in NoA >>s, 43(3):531-556, 2009). I argue that versions of the tracing strategy that require reasonable foreseeability (rather than actual foresight) are in tension with the view that blameless ignorance excuses. A stronger version of the tracing strategy (i.e., one that requires actual foresight) is consistent with the view that blameless ignorance excuses and is therefore preferable for those tracing theorists who wish to continue maintaining that it does.