You may file suit for recovery of money in the appropriate court of law after paying the requisite court fee, which depends on the amount of money taken by your uncle on loan . Civil litigation, especially recovery suits generally termed to be a long drawn battle and regarded as something best avoided, is not so. The general belief that by filing a recovery Suit against a Debtor will go on for years at large, is not so, if one knows the real scope of Order 37 of the Civil Procedure Code, 1908. You may engage a good lawyer to this effect.