Yup. In your wallet it's visible, but go to his wallet and its blank.
He can see the memo in his wallet but not in yours.
Not sure if its advertised as a feature, but it works.

Yes i tried it matt. It worked!

Coin Marketplace

STEEM 0.27
TRX 0.07
JST 0.034
BTC 24330.31
ETH 1899.44
USDT 1.00
SBD 3.33