LOS ANGELES  An ever-widening budget gap joined with intractable political paralysis to deliver California its biggest fiscal blow in decades on Thursday, when the state’s controller began printing i.o.u.’s in lieu of cash to pay taxpayers, vendors and local governments.

It was only the second time the state had adopted the emergency payment method since the Great Depression. The National Conference of State Legislatures had no record of any other state’s ever using them.

It was unclear whether the i.o.u.’s, known as warrants, would be accepted by all of the banks in California, which were caught off guard by the move and seemed hesitant to entrust the state to repay the them  at an interest rate of 3.75 percent  in October, as promised.

The controller, John Chiang, issued 28,742 warrants totaling $53.3 million. If state lawmakers fail to reach a budget agreement by the end of August, the amount would grow to $4.8 billion.