After disabling the Cash On Delivery options for almost all orders, e-commerce giants such as Amazon, Flipkart and Snapdeal have now resumed COD service. However, you still need to make the payment with valid Rs 500, Rs 1000 and Rs 2000 notes. 
Post demonetization of Rs 500 and Rs 1000 notes, Amazon completely disabled the COD option of payment while Flipkart and Snapdeal limited it to selected orders above Rs 1000 and Rs 2000 respectively. Further, all the three e-tailers displayed a message saying ‘old Rs 500 and Rs 1000 notes will not be accepted as payment’. Flipkart now mentions that ‘new Rs. 500 notes issued by the Reserve Bank of India after November 10, 2016 will be accepted after they become available’
Not only this, these websites (Snapdeal) even started offering discounts on Debit/Credit card payments to encourage prepaid payments option during this time. Not only this, Snapdeal even partnered with Freecharge to introduce ‘Wallet on Delivery’ feature through which one can pay via Freecharge on the delivery of the product.
On the other hand, e-wallets like Paytm and Mobikwik has now announced free bank account money transfer till December 31 even though earlier Paytm use to charge 1% as a transfer fee.