bond and cheque related section

Without a written agreement or understanding or participation in business, the chances of filing suit and recovering that 30% return amount is remote.  Do not waste your time, energy and money on wasteful litigation.  Prevail through mutual friends and thank him for returning the money in time.  One can not predict any thing even in between friends in business, many persons take small amounts, return them within due date, create confidence only to get higher amounts offering higher interest.  Thank your stars for getting your original amount and be cautious in investing hard-earned money and do not be lured by excess returns during the period of recession. 

Yes, there is no cause of action to approach a Court of Law.

Lucky you got your money back.