It's not, I enter in the code to the URL on the paper and it shows that it can be redeem. On the screen that it shows it's active it prompts me to sign up or log in which I don't have an account. I personally like the hard copies of movies.
Don't worry, you are doing the right thing to verify the code and posting a picture of the verification. As long as you are not logged in to the site, the code stays good. I like to use "myuv.com" because you don't even need the title of the movie, you just need to put in the code and it reports back the movie. Thank you for doing it and keep on doing it! When I sell codes, I check before I list and then recheck before I send the code. That's the smart thing to do!!