blacklist
A list of people, organizations, or items to be excluded, banned, or penalized. Used in business, security, and everyday contexts.
彼はブラックリストに載っているので、入国できない。
He is on the blacklist, so he cannot enter the country.
That company was put on the blacklist.
The company put the dishonest business partner on its blacklist.
We added the troublesome customer to the blacklist.
After the issue was resolved, he was removed from the blacklist.