question

I'm using clover secure pay in my android application like the code given below. But it shows an error "Transaction failed: Invalid order ID. Print receipt?", while payment. Is it not possible to pass a random number(unique) as order id for the payment? I need such a number for future reference. Please help me;

Intent intent = new Intent(Intents.ACTION_SECURE_PAY);
intent.putExtra(Intents.EXTRA_AMOUNT, amount);
intent.putExtra(Intents.EXTRA_ORDER_ID, orderId);
startActivityForResult(intent, SECURE_PAY_REQUEST_CODE);