The Rama in Orach Chaim 696:6 says we do not send Misloach Manos to an Aveil (mourner). The way people send is to send it to the family, rather than directly to the Aveil.
- If you do not know anyone else in the Aveil's family, can you still send it to such a family member?
- Suppose someone is in Aveilus (mourning) and a person shows up delivering Mishloach Manos. How should he respond?