It is very simple to sign up with Lake County Appeal! You can click here to begin. Once you sign-up, it will only take a few minutes to complete your RapidReviewSM . You can quickly and easily provide LCA with the necessary information on-line through our RapidReviewSM. LCA pioneered the on-line appeal process, and now our RapidReviewSM system makes it even easier and faster to sign up for an assessment review.