name no names
To say no specific name or names when reporting or discussing an incident. I'll name no names, but I saw someone spraying graffiti on the back wall of the school. He has reported widespread corruption in the industry, but he named no names.
name no names
refrain from mentioning the names of people involved in an incident. 1999 New York Times Naming no names, two familiar Presidential candidates…recently sought to get at the son by condemning the father's promise of a ‘kinder and gentler’ nation.