California Penal Code Section 1202.4 Mandatory Fine
In People v. Tillman (2000) 22 Cal. 4th 300 [92 Cal. Rptr. 2d 741, 992 P.2d 1109] the People argued that the trial court erroneously had failed to impose a mandatory section 1202.4 fine.
However, what the trial court had done was fail to state on the record the compelling and extraordinary reasons which it presumably found to exist (as it otherwise could not legally have avoided imposition of the fine).
Such omission was correctable had it been timely raised by the People. Tillman held that the People waived this issue by failing to raise it in the trial court.