If a sponsor is self employed does HO check the contracts and invoices? My sponsors clients just were transferring him money for the services, no contracts, just invoices, business bank statements. How to proof the job is genuine?

Omg. This forum is so useful. Can I ask some questions as I'm very nervous after reading some cases. I'm about to apply for EEA FM. I'm on tier4 from sept 2014 until October 2016. I was dating with a guy for two years, we married in January 2016 and I moved to his place after marriage (yes-yes only ...