In most cases STARs do not drop you off at an IAF.
If ATC cannot vector you (and you do not have RNAV) they could clear you direct to a VOR or NDB that will be the IAF or a transition to the IAF.
They could also have you track a radial to an intersection where the approach begins.
Last edited by paulsalem; 2nd Oct 2012 at 00:52.