§ 53.1 · Correction
The SAR clock starts at detection, not at the transaction
1020.320(b)(3) reads "no later than 30 calendar days after the date of initial detection by the bank of facts that may constitute a basis for filing a SAR." An activity from four months ago that your analyst surfaced on Monday is due 30 days from Monday. Tools that anchor the due date to the transaction date will show you a breach that is not real, or worse, hide one that is.