The manager of 1970s US rock group Redbone says a band which performed using their name at a fair were impersonators.
Ron Kurtz says the group played at the Butte-Silver Bow Fair in Montana as Redbone - while the real Redbone were playing in Wisconsin.
"I've been in the business for 40 years, and I've never run into anything this blatant," he told the AP agency.
Officials say they dealt with a man who said he was a co-founder of Redbone.
But Pat Vegas, who founded Redbone with his brother, Lolly, in 1968, said he had not heard of the man.
The board of the Butte-Silver Bow Fair is investigating and will consult the county attorney, chairman Dave Palmer said.