•If a decision is wrong or no longer correct, it can be changed by a new decision – called either a ‘revision’ or a ‘supersession’.

•You can apply for a revision or a supersession, or the DWP, local authority or HMRC can carry out one because it wants to change your award.

•In some cases, you do not need to show any grounds for a revision, but you must ask for one within a set time limit. In other cases, you can ask for a revision at any time, but you must show there are specific grounds.

•The date on which a revision or a supersession takes effect determines the date from when you are paid arrears if you are entitled to more benefit, or the date from when you have been overpaid if you are entitled to less benefit.