I dont think it should be "forced" on anyone. I do it because I have proof that the item was sent. My items cost me a lot of money, also, there are those that claim not to have received when in fact, they did. So, I chose to do it. If the vendor doesn't care, then its up to them, but as a buyer, you could always request it.. you do have to meet some requirements, like you cant do DCN with a regular envelope, it has to meet some requirements. yea, it does cost more, but its worth it..