Are you thinking of the Currency Transaction Report reported to FinCEN for each transaction of $10K or more?
Not sure. On a few occasions I have had to deposit large sums of cash at my FCU. I was told that cash deposits over $5000 had to be reported to the govt. (not sure what dept). So, I made several $4999 deposits and all was fine. This has been a few years ago.
Hard times make strong men
Strong men create good times
Good times create weak men
Weak men create hard times