Stipend Payment By Cash

Respected seniors,
One of my freind is working in an organisation as trainee. It has 11 employees. They are supposed to get stipend of Rs.30,000 but employer is giving only Rs.13000 by cash. Further no PF ESI is being deducted. They are also not giving any salary slip. I want your valuable suggestions, what actions can be taken against employer. Is there any rule for payment of slary above 20000 by cheque only. They have taken signature on receipt for Rs. 30000/-
Regards
R K Saini

Dear Saini
First tell him dnt sign on Rs.30000/- bcoz he get only Rs.13000/-
what is the agreement employer.
No PF, ESIC & P-Tax is being deduct from stipend amount. bcoz salary are stipend amount its diff..
rule is that stipend pay through vaucher. or payslip issue only for employees.
any problem the cal me i will help u.