Bosses at a U.K. rehab center attended by Amy Winehouse and Jonathan Rhys-Meyers have been fined $57,000 for treating patients without obtaining a proper license.

District Judge Cooper criticized the owners of the Causeway Retreat for being "scandalously negligent, if not downright misleading and fraudulent" in a ruling at Chelmsford Magistrates' Court, England on Friday.

Managers of the private hospital on Osea Island in Essex, England pleaded guilty to two charges of carrying on a medical service that was unregistered with the Care Quality Commission.

The judge ordered them to pay $12,000 in fines and $45,000 in costs.

Experts at the clinic, which closed in May, treated clients including Winehouse and Rhys Meyers for alleged addiction problems.

Click for more great Amy Winehouse pictures: