Verify genuineness of bill

Dear Experts, I have kept gold of my wife in custody of my family friend in 1998 while i was moving out of india for a long period. He was under impression that i have gifted him that gold and so now when i asked to return that gold, he is now showing me a receipt of selling that gold to a jeweler in Apr 2003 at the gold rate of 2003 and offering me the amount he got in 2003 from that jeweler. I have doubt on the genuineness of that receipt as it as both TIN number and CIN number. As per my little knowledge of TIN & CIN number, i think TIN doesn't exist in year 2003. I have verified the TIN from internet www.knowyourtin.com where it is showing correct jeweler name but showing that "Date of registration under CST act" as 01-Apr-2005. Since he is close family friend so unless i am sure about genuineness of the bill ( doubt on Date of registration under CST act which is latter than bill date having TIN) i don't want to question my friend. Please guide how to verify the bill authenticity? Does TIN/CIN exist in year 2003?