The Department for Work and Pensions (DWP) has said many people could be missing out on cash worth around £3,500 per year.
In a tweet on Monday, the government department urged people to check their entitlement for Pension Credit. The money, it said, can be used to help with daily living costs such as "Council tax, housing costs and heating bills".
It comes after Age UK estimated last month that around a third (34%) of pensioners eligible to claim Pension Credit are still missing out.
