We generally add, "we will accept cash deposits only until xx-xx-xx at which time the account will be closed." we leave it open for 10 days to provide a chance for checks written on the account to clear. That said, since you filed a SAR, you may need to look at the circumstances of your SAR before adding this to your closure letter.
"Once you learn to read, you will be forever free."
- Frederick Douglass
My Opinion Only.