Chris,
All they did was add identity theft to the list of reportable activities; the regulations which dictate the dollar thresholds were not changed.
If it is identity theft you are reporting, it would seem to me that all you usually have is a victim, not a suspect. If that is true, in most cases your threshold will be $25,000. The only relevant guidance I know of on this topic was issued well before they revised the form, in SAR Activity Review # 3, Section 6.
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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.