Hiring of Temporary Workers - formalities that is to be complete?

Dear Sir / Madam / HR Professionals,
Kindly let me know what are the formalities that is to be completed for hiring of temporary workers (4 - 6 nos.) for a short period of 2 months. We have already given a PO for the concerned labour supplier for the hiring of temporary workers.
Also let me know what are the legal documents to be maintained from our side. What are the documents that are to be collected from the labour supplier before getting the hired labours.
If you have any format regarding the same, kindly let me know.
Thanks & Warm Regards
Vinayak Sonawane

Dear Vinayak Sonawaneji,
If you are engaging only 6 to 19 contract workers or temporary workers in your firm, there is no legal formalities to be done, in case if you are engaging more than 20 workers they only all the legal formalities will bind with you. First you should register your firm under The Contract(A&R) Act, and the Contractor should take license from the appropriate government. And you will provide all the welfare measures, records and registers should be maintained.
Thanks
Shunmugaraj.S

Dear Vinayak
If you are engaging only 4 - 6 temporary workers in your firm through any other labour supplier on their roll, then you are advised to ask the labour supplier to issue them letter of appointment for specific period, the employee/ workman should be covered under the provisions of ESI Act and EFP & MP Act, if your company is covered under the above said Act.
If you wants to employ/ engage temporary workers in your firm more than 20 workers then you have to obtained the Registration under the provisions of Contract Labour (Regulations & Abolition) Act, 1970 and your labour supplier should obtain License from the concerned Authority and labour supplier should issue them letter of appointment for specific period, the employee/ workman should be covered under the provisions of ESI Act and EFP & MP Act, if your company is covered under the above.

I am totally opposite this, If you are not registering any contractor due to less manpower then those employees will fall under principle employer responsibility.
So it's better to modify the contract labour licenses and show them in the contractor list.