A former Florida staffing firm owner was sentenced to 10 years in prison in a scheme that caused a loss of more than $2.7 million to a factoring company, the U.S. Attorney’s Office announced.

Otto Biltres, 42, of Tarpon Springs, Fla., submitted a series of fraudulent invoices to TempPay Inc., an Ohio-based factoring company, according to the U.S. Attorney’s Office. The invoices related to four companies which Biltres claimed to supply temporary workers but, in fact, he had no business relationship with those firms.

To create an illusion that the fake invoices were real, Biltres opened P.O. boxes, bank accounts, email accounts and websites in the names of the purported client companies, according to the U.S. Attorney’s Office. Biltres used proceeds from later fraudulent invoices to repay earlier invoices.

Biltres pleaded guilty on Nov. 25. His company was Biltres Staffing of Tampa Bay LLC.