Guy Hain (?-) is a French art forger who produced number of fake bronze sculptures.

Guy Hain begun as a seller of veterinary products. In his job he met a number of veterinarians who had antique bronze sculptures of animals and developed an interest of them. In 1962 he spent 550,000 contemporary francs for Rodin's Kiss. When he was barred working as a salesman, he became an art dealer . He opened a gallery "Aux ducs de Bourgogne" in the Louvre des Antiquaires antique center. He closed the gallery in 1988.

Hain approached the foundry of Rudier that was one of the foundries that had produced Rodin's bronze sculptures at the beginning of the 20th century. He convinced the owners Georges and Bernard Rudier to use the original molds to recast known Rodin works. He set up a chasing shop in Nogent-sur-Marne and 1990 bought the Balland foundry in Luxeuil-les-Bains and managed them with his wife.

Since the bronzes were based on the original moulds, the experts could not see the difference. Some of the bronzes were also made based on production plaster copies used 75-90 years previously.

Hain sold thousands of new bronzes to art dealers as originals, using the signature of Alexis Rudier, the original caster for Rodin. He earned equivalent to FFR 130 million ($18.2 million). He later claimed that he had a contract to use the name of Alexis but the Rudiers contested that.

He expanded to the production to copies from other sculptors like Aldred Barye and Antoine-Louis Barye, Jean-Baptiste Carpeaux, Camille Claudel, Christophe Fratin , Emmanuel Frémiet, Aristide Maillol, Pierre-Jules Mene and Pierre Auguste Renoir. He practically flooded the art market with his copies.

In January 1992 police inspectors from Dijon, Burgundy, arrested Hain and seized about 20 metric tons of bronze sculptures in various foundries in Burgundy and Paris.

On January 17, 1996 Hain appeared in court in Lure, central France, accused of forgery. On June 28, 1997 he was sentenced to four years in jail but served only 18 months.

Rambouillet auctioneers Rey et Faure were also charged with complicity for selling the bronzes in their own auctions between 1987-1991. They had sold copies worth of about $3 million. Big bronze would-be-Rodin called "The Kiss" was sold for FFr4.5 million ($800.000). They were later discharged.

Other auctions houses like Christie's and Sotheby's had also sold the copies to their customers.

When Hain was released, he continued the practice: he had the bronzes produced in stages, one foundry making casting, one chasing and one the patination . In 2000 he registered the names of Alexis and Georges Rudier - alongside with a number of other foundries - as trademarks he was supposedly allowed to use. Georges Rudier sued him to get the names back.

He was rearrested 2002 and went to a court in April. Evidence collected by Dijon police department consisted of 1,100 copies of works of 98 different French sculptors. Prosecutor asked for five years in prison and FFr2 million fine.

The art dealers and collectors became very suspect of bronze works. Conservator Gilles Perrault calculated that Hain had had produced over 6,000 copies beyond those the police had confiscated. Only one-third of the copies had been traced.