TMZ has learned Debra Opri got a visit tonight from a famous P.I., who served her with Larry Birkhead's lawsuit filed Friday.
Birkhead hired attorney Michael Trope to sue Opri, alleging she defrauded him by taking hundreds of thousands of dollars he earned and diverted them into her client trust fund account.
John Nazarian, the famous P.I., went to Opri's Santa Monica home tonight and handed her the lawsuit. We're told Opri's reaction: "I have insurance to cover this,"
Opri then told Nazarian, she wanted to know who the hell was Michael Trope. Nazarian put it this way, "I wouldn't want him chewing on my ass."