You may direct the contractor to comply with the requirement of Form T under the T.N. Shop & establishment Act 1947. I have extracted a copy from net, you may get it verified also.
"FORM - T
WAGE SLIP / LEAVE CARD
[See sub-rule (6) of Rule 11]
THE TAMIL NADU SHOPS AND ESTABLISHMENT ACT, 1947 AND RULES, 1948"
1 Name and address of the Establishment
2 Name of the Person Employed
3 Father's or Husband's Name
4 Designation
5 Date of Entry into Service
6 Wage Period From To
7 Wage Earned Deductions
(a) Basic (i) Employees Provident Fund
(b) Dearness Allowance (ii) Employees' State Insurance
(c ) House Rent Allowance (iii) Other Deductions
(d) Overtime Wages
(e) Leave Wages
(f) Other Allowances
(g) Gross Wages Net Amount Paid
8 Leave Availed during the month CL SL EL M
9 Leave at Credit CL SL EL M
Signature of the Employer / Manager / or any other Authorised Person Signature or Thumb impression of the Person Employed