What happens if you forget to put up the license plate sticker in CA?

If you forget to put the license plate sticker on your vehicle in California, you may face a fine if you are pulled over by law enforcement. While the sticker is meant to indicate that your vehicle registration is current, the absence of it does not necessarily mean your registration is invalid. However, it's important to ensure that you carry the proper documentation and have your registration up to date to avoid issues. If you receive a ticket, you can often contest it by proving your registration is valid.