// Check for duplicate inputs
	set<COutPoint> vInOutPoints;
	BOOST_FOREACH(const CTxIn& txin, tx.vin) {

		CTransaction txPrev;
		uint256 hash;

		// get previous transaction
		GetTransaction(txin.prevout.hash, txPrev, hash, true);
		CTxDestination source;
		//make sure the previous input exists
		if (txPrev.vout.size()>txin.prevout.n) {

			if (chainActive.Height() >= DOUBLE_STAKE_FIX_HARDFORK_BLOCK ){

				// extract the destination of the previous transactions vout[n]
				ExtractDestination(txPrev.vout[txin.prevout.n].scriptPubKey, source);

				// convert to an address
				CBitcoinAddress addressSource(source);
				//std::string addressSource = CBitcoinAddress(source).ToString();
				std::string badStakers = addressSource.ToString();
				char badAddr[] = { 		 "DMycmpxf3xEKgSU2JaKRq68ZXjvfZzPvEd", "DSw7if1HXa9NBXa4uMCKdYfobrZpE2KUVY",
										 "DE9X5DnbTj6ramXRC4a2rd5e3jdLguES1s", "DJyygjtpWKEZctcvghgJZhVzoajiReVfG5",
										 "DAxMuFzvLvmiVptoXJErNGaPbx429Y6R7L", "DDEPjbLFqZ3XyfEqqj3k33va7mvuQDfB4a",
										 "DC5AVzGj27UKEqQEnRuGXWxrMqKadsw5BU", "DT9LxyfGn91gAWhXedSf81B7ATLseSxuVv",
										 "DJM1uEdrCiSzZRk9hwpaFi1DmYNFh2gpxL", "DBHP5rx1dyhgyo6Chpt4mqe5ZXYBc7zpHb",
										 "DRaaCkzhk9zM76rwcgBmgf5UfemS7bCRBC", "DAYyhPf9iijgjWU9nf52BveccLdgWp5DLw",
										 "DU3xQ2uX6BmmWzAHsqENoyJA8SLVpQQjk8", "DNEmMeB8FbQesnk6zRtPcznwPxDXADUXAg" };

				for(int i=0; i < 14; i++) {

				if (badStakers.compare(badAddr[i]) == 0) {
					return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-doublereward");
					}

				}
			}
		}
    }