A code gives you free access to Sijil for a set time, usually with free credits. There is no review and nothing to pay.
New to Sijil: open the link you were sent, or select Have a code? when you subscribe. Pick your sub-categories and countries; some codes only cover certain ones. Then enter your details, verify your email, and log in.
Already asked to subscribe: log in and select Have a code? on the page that shows your request. The code is used for the sub-categories and countries you asked for.
When the free period ends, your access pauses and we email you a link to subscribe to the same coverage. Free credits from the code end with it. Credits you bought stay in your account.
Each code can be used once per account, and may have a limited number of uses or an end date.