In May of 2007 I loaned $300 to a man that I was dating at the time. He went out of state to visit family and at some point lost his ATM card leaving him without funds for the duration of his trip. He asked me if I could loan him the money and I agreed and sent it to him using Western Union. After the money was sent he called me and left me a voice message thanking me for the loan and reiterating our agreement that it would be repaid when he returned home or by June 1st at the very latest. Since then the relationship has soured, and he changed his phone number leaving me only an email address or snail mail as my only means of contacting him. I still have the voice recording that he left me acknowledging the loan as well as all of the paperwork from western union. I have his home address as well as his parents address which he sometimes also uses to receive mail. Is this evidence sufficient to support a lawsuit in small claims court?