* make sure the deposits are under $9000, but also not some amount that's "suspicious" like $8,999
* make sure the deposits happen on a regular interval
* make sure the deposits are at the same branch
I also suspect banks don't share information to generate SAR (eg. a deposit of $15,000 at one bank would generate a SAR, but a deposit of $7,500 at two banks on the same day won't generate a SAR), so if you need to deposit more cash then all you need to do is open more accounts at more banks.