Do Work work experience in family business is considered as valid work experience by IIMs.

I completed my B.Tech in 2016 and reject the TCS offer to get into family business as per my fathers wish. I even converted IIM Jammu and not joining it because of it being a new one. I dont have pay slips (since it is our business). I am going to attempt CAT 2017 and how can i show my work experince as a valid one ? and what are the proofs do i need to submit at that cost? Please help me in this.

I completed my B.Tech in 2016, and rejected the offer from TCS as i want to get into my family business as per my fathers wish. I dont have any salary slips (as it is our business) and i also conveted IIM Jammu and has not joined it. Now i want to attempt CAT 2017 and how can i show my work experience as a valied one? Also what are the documents i need to provide at the cost?