In 1994, the regulator ordered a review of sales of personal pension policies taken out between 29 April 1988 and 30 June 1994. This review - known as the Pensions Review - ended in 2000.
But we sometimes receive complaints about the sale of pensions that weren't included in the review.
In these cases, if we decide a business did something wrong, we use some assumptions - which are reviewed every year - to decide how things should be put right.
Our latest assumptions are available on our website.