Unfulfilled eligibility (previously called claimant error underpayments) occurs where a claimant fails to provide accurate information or evidence about their circumstances and as a result does not receive the full amount of benefit they are entitled to. Unfulfilled eligibility was estimated to be £3.7 billion in 2024–25, up from £3.1 billion in 2023–24.42 It particularly 36 C&AG’s Report (overpayments), para 3.35; Public Authorities (Fraud, Error and Recovery) Act 2025 37 C&AG’s Report (overpayments), para 19 38 Qq 37, 47 39 Qq 37-38, 47 40 C&AG’s report (on overpayments), Figure 10 41 Q 47 42 C&AG’s report (on accounts), para 8; C&AG’s Report on DWP’s Accounts 2023–24, Session 2024–25, HC 129, 22 July 2024, para 21 13 affects claimants of disability benefits who fail to report that their condition has worsened. The highest levels of unfulfilled eligibility are for Personal Independence Payment and Disability Living Allowance, with estimated rates of 4.1% (£1.06 billion) and 11.1% (£0.85 billion) respectively in 2024–25.43 People not regularly reporting changes of circumstances is also a key cause of Universal Credit overpayments.44