Career Advice Needed

[byblos]

I hold Financial Plannning Cert 1,2 & 3.  My previous roles have mainly been in assessing/checking suitability of sales. I have recently been offerred the opportunity to work with an IFA on a self employed basis (no basic salary or benefits). He has said that he will pass me 500 clients from his client bank, but I think its unlikely that they have been contacted by his company for some time.  Can anyone give me any advice on what questions I should be asking him before I commit.  Also what % of commission should i split with him, given that I will be trading under his name. Thanks