Millions of people who claim benefits Department for Work and Pensions (DWP) are being warned over £50 fines.
Benefits, including Universal Credit, help people with the cost of living, if they are unemployed or on a low income, for example, or unable to work for health reasons. Other benefits are given when men and women in Britain reach a certain age.
Government advice warns anyone who claims such benefits could be fined £50 if they fail to let the authorities know of a change in circumstances. This includes things such as having a baby, or getting a divorce.