1. In the instant matter you shall have to file the Money suit with in 3 years from the date of the cause of action which may be considered as the date of the loan agreement being June of 2013.
2. Collect a letter from your Uncle acknowledging his debt on you and file the suit with in 3 years for the date of his signing the said agreement.
3.Alternatively, you can also get the said cheques filled up with present date adding the interest and present it with your Banker.
4. In the event of its being dishonoured, you can get the cause of action of the date of the cheque and filed the M.Suit against him.
5. You can also initiate a cheque bouncing case u/s138 of N.I. Act where in your uncle will try to prove that he had issued that cheque as security cheque which does not come under the purview of N.I.Act and your lawyer shall have to defend the said argument that the said cheque was issued on the same date as has been mentioned on the cheque towards the repayment of the entire loan amount with interest for which it is not a security cheque.