Dear Mr Sarathy, In my view your company asking for refund of incentive paid earlier is completely wrong, they cannot insist, rather you can insist them to to give proper documentation and releaving you with all due respects. before this please ensure to collect the document on which you have collected the incentive. this will be a substantial proof for you to establish that the company had paid you an incentive. in any case as mentioned by our friends the issue is between both the companies, and you are no where involved. If the client is generated by you and as it is understood that without any contract been signed between both the companies you have supplied the manpower then you may be questioned about the procedural defect, but company cannot ask you to reply the incentive.