A team of senior IELTS examiners will mark your test again. Of course, none of these examiners will have marked your original test. And, they also don’t know your original test score. That ensures it’s a fair re-mark.
IELTS relies on qualified IELTS examiners. They are intensively trained and monitored to ensure consistency and quality of marking, no matter where in the world the test is taken. For example, a minimum of two examiners will mark your Writing test, and sometimes even up to three or four – we do this to ensure the highest level of accuracy and fairness possible.