Issue: When trying to register for an event (or promotion, or mailing list, etc.) through the website, you are eventually prompted to enter a 3-character, randomly-generated code. If, for some reason, this code doesn’t work the first time, it still will not work after you go back to try again.
Solution: After you go back to the page on which you enter the code, you must first refresh the page to generate a new code. Once a code has been used, successfully or otherwise, it is immediately invalidated. Going back to the submission page, however, does not generate a new code, so you will only see the already-invalid code. Refreshing the page (by pressing F5 in most PC browsers or Command-R in most Macintosh browsers) will cause a new code to be generated, allowing you to continue normally.
