Recently, I began meeting with one of the math professors in my department for an informal language exchange. I noticed something about writing:
The spacing for 씨 as a term of address seems to be inconsistent. Sometimes it looks like “니콜라스 씨” and other times “니콜라스씨”. According to my Korean professor, the correct usage is with space (i.e. “니콜라스 씨”), but usage is not consistent with all Korean speakers.
An equivalent of “Best, Nicholas” as a sign-off is “니콜라스 드림”