blacklister
/ˈblækˌlɪstər/Definitions
1. noun
A person who is placed on the black list or has been penalized or punished in some way.
“The company was accused of blacklisting its former employees, making it difficult for them to find new jobs.”
2. verb
To place or add someone’s name to a black list, especially in order to prevent them from being hired or to punish them.
“The talent agency blacklisted the actor after he was involved in a scandal.”