Simpson is suing a Las Vegas hotel-casino that banned him in November 2017, alleging that unnamed employees defamed him by telling a celebrity news site he had been drunk, disruptive and unruly.
It prohibited him from returning to the Las Vegas Strip property.
The defamation complaint said a parole officer arrived unannounced at Simpson's Las Vegas home following news reports of the Cosmopolitan incident and administered drug and alcohol tests.
Simpson was acquitted in Los Angeles in the 1994 slayings of his ex-wife, Nicole Brown Simpson, and her friend, Ronald Goldman.
The lawsuit was first reported by the Las Vegas Review-Journal.