If any man doesn't obey our word in this letter, note that man, that you have no company with him, to the end that he may be ashamed.
And have no company with him - The Greek word here means, to mix up together; then to mingle together with; to have contact with. The idea is that they were not to mingle with him as a Christian brother, or as one of their own number. They were not to show that they regarded him as a worthy member of the church, or as having a claim to its privileges. The extent of their discipline was, that they were to withdraw from him; see the 2 Thessalonians 3:6 note, and Matthew 18:17 note; compare 2 John 1:10-11.