Evidence do I need in a averbal cotract case
I am in Tulsa OKLA. I loaned SOMEONE $7,750.00 , He said he would pay me back $500.00 a mouth. He paid me one payment of ($300.00 ) The loan was done on 08/082013. The one and only payment that was made was on 11/07/2014. I am thinking of going to a small claims court. But there is NO paper work or contract for EVIDENCE. So, the case would be a ( Verbal Contract case ). All the evidence I do have, is the people that was there at the time. And that was, my wife, (55), my son (27), & a friend (59), and me (66 yrs. Old ), I have called him over and over about ( 20 or more times ) DO I HAVE ENOUGH ? Do I have a case ?