Are Voucher Payment Employees Cover Under PF & ESI Act?

Dear Seniors,
In my organisation, engaged 13 no manpower ( Prist, Temple Sweeper, and other support services) since more then 10 year and due to lake of knowledge my previous officer deduct their ESI only, their wages paid by organisation as a vaucher payment worker, how to rectify the issue and what is the legal consequence. kindly suggest and advice.

What is the issue actually? You have been paying 13 employees by vouchers after deducting ESI? Yes, what is wrong in it? You continue to pay it till you make a system of paying salary through Bank. Once you are ready with the bank accounts of all the workers you stop this present system and switch over to the payment through bank