Lindsay Lohan's lawyer insisted the 24-year-old actress did not drink or take drugs during her 90-day stint at the Betty Ford rehabilitation centre.
"I had numerous conversations with Betty Ford counsellors and doctors over the course of Lindsay's treatment there and it was never suggested by anyone that she ever drank or used drugs," Shawn Holley said.
Her comments followed internet reports claiming Lohan was under the influence during an altercation with a rehab technician last month.
Ms Holley added: "Her discharge letter from the facility is totally consistent with that."
Lohan (24) was released from the Rancho Mirage drug dependency centre, about 120 miles east of Los Angeles, after receiving treatment there since late September in connection with her drink-driving case.