FinCEN apparently publishes updated versions of this Advisory at will, automatically deleting previous versions from their web site. The most recent version I had was February, 2013. (Thanks for linking the current version.) My version no longer appears on the web site any more than the version Jessesgirl saw "a few years back" does. So, finding either would have been nearly impossible. FinCEN does not provide any notice that a revision has been published. Understandably, most of the bankers I've shown this to over the years had no idea of its existence anyway.
One purpose for using key terms is to make the SAR data base more readily searchable by both law enforcement and FinCEN personnel performing statistical analyses. They want SAR filers to use these key terms in the narrative. Also, if there is no equivalent check box in 29 - 38, they also want you to check "Other" and type in the key term.
On the legacy SAR none of the "key terms" had their own check box. On the FinCEN SAR, some do; e.g. "financial exploitation of the elderly," and "account takeover." So, the guidance makes a tad less sense than it did at one time, but still works for terms like "funnel account" and "tax refund fraud," etc. where there is no check box on the report.
My suggestion, not necessarily FinCEN's, is that if you have checked a box in 29 - 40 the word or words it includes should be conspicuously mentioned in the narrative no matter what.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.