"Kim Basinger did not release the voicemail. Additionally, the voicemail was not sealed under a court order," said a statement released by the actress's publicist, Annett Wolf, on Monday.
Baldwin left a voicemail lambasting his daughter, Ireland, for failing to answer the telephone for a prearranged call. The tape was aired by the celebrity Web site TMZ.com on Thursday and quickly made headlines around the world.
A Los Angeles Superior Court commissioner ordered Baldwin to stay away from his daughter pending a May 4 hearing.
Baldwin, who has been locked in a custody dispute with Basinger since their 2002 divorce, blamed her for the leak on Friday. He also apologized on his own Web site for "losing my temper with my child."
"I have been driven to the edge by parental alienation for many years now," Baldwin wrote.
"Everybody is always asking why this custody battle has been going on for so many years, and now they have the answer. The issue is not about Kim or the alleged alienation that Alec constantly refers to; it is about his ongoing aggressive behavior," Basinger's statement said.
"Kim's sincerest wish is for him to finally address his unstable and irrational behavior so he, at some point, can potentially create a relationship with his daughter," the statement said. "Until then, Kim will continue to protect and safeguard her child's well-being as any parent would."
Basinger is facing trial on 12 misdemeanor counts of criminal contempt for allegedly disregarding court orders concerning Baldwin's visitation rights.