Ask The Salty Waitress: How can I report an employer who’s skimming tips?

Hi Salty, There is a restaurant my friend worked at on Long Island. Servers receive a set $90 gratuity on parties. My friend worked a large party with a $6k tab. He noticed that the manager added an automatic $1,200 tip….but still only gave him the $90 tip after busting his ass for several hours. He was told not to…