Bulllllshit. THe OP is lucky he got a love letter for what they are calling 16 grams of K, he could have very well had a CD over that. There was just a story of someone who had a CD for half a sheet of acid. I have never heard of schedule ones being intercepted with out a CD for any amount. K is schedule III. I have only definitively heard of CDs for schedule V + , marijuana seeds and research chemicals. But a love letter from a small amount of a schedule III is believable. People who say only massive orders get CD are completely full of shit though. if they only did love letters for small amounts every trafficker and their grand mother would just swarm the shit out of product and split kilos up into a hundred ten gram packs.