Contract format given to the clients when we as an IT company outsource a candidate to the client on our payroll?

Hi, I am a fresher in the HR domain, can someone help me out with a document that is an agreement or a contract format given to the clients when we as an IT company outsource a candidate to the client on our payroll. Looking forward for all your valuable feedback,
Thank you.

What type services you have got outsourced or given? Is it manpower supply counterpart or any tech.input involved? You extended service of your person on your pay roll to your client, am I correct. How do you go about the candidate's salary payment if you take him on your payroll, works in your clients' premises and at the rate fixed by you. May be you would add your charges + taxes and raise invoice for reimbursement. Right? What's the duration & separation benefits ?