The Department has not given people who are worried they have been underpaid enough information to find out what they should do, with the risk that many may still miss out on money they should receive. The Department’s communications strategy is to only contact those who it finds have been underpaid under the State Pension regulations. Other groups of pensioners can receive arrears if they make a claim for additional entitlements to the Department, but the Department has provided very little information on which pensioners should do so. The Department maintains it cannot publish guidance for those who may have been underpaid, such as an online assessment of whether it is worth a pensioner contacting the Department about their pension, because it believes it cannot accurately cover all possible underpayment scenarios. Furthermore, the Department’s priority so far has been to focus on living pensioners rather than the deceased, even though some of their next of kin may be financially vulnerable. The Department does not have a plan to trace the estates of the deceased where no up-to-date records of spouses or next of kin are held. Recommendation: The Department should improve the clarity and availability of information on State Pension underpayments, and what people who are concerned that they have been underpaid should do. This should include information for groups the Department finds hard to reach such as the next of kin of deceased customers.