Hi all, I would like to know the relevant procedures for returning the delivered goods (Old goods) back to the seller.

The seller had his New goods to be delivered to me using kangaroo express and once I had received the New goods, the seller had told me to exchange them with the Old goods back to the delivery man.

So, My question would be, during this process, is there any relevant documents which I must have to prove that I had given the Old goods back to Kangaroo express and its their responsibility to deliver back to the seller.

Note that the seller had the returning and the delivery processes paid to Kangaroo express and with that, I am not charged of any delivery service.

Hope you guys /gals can help me out. Thanks in advance.