Former funeral director Robert Bush has pleaded guilty to 35 counts of fraud by false representation after an investigation into human remains.
The 47-year-old also admitted one charge of fraudulent trading in relation to funeral plans at Hull Crown Court.
But he pleaded not guilty to 30 counts of preventing the lawful and decent burial of a body and one charge of theft from charities.
He will face trial on those charges at Sheffield Crown Court next year.
Humberside Police launched an investigation into the funeral home after a report of "concern for care of the deceased" in March last year.
A month after the investigation started, the force said it had received more than 2,000 calls on a dedicated phone line from families concerned about their loved ones' ashes.
Bush, who is on bai