Lost pension pots are estimated to be worth an average of £9,500 each, underscoring the financial benefit of tracing them.
The Pension Attention campaign, co-ordinated by the Association of British Insurers and Pensions UK, aims to encourage people to reconnect with forgotten savings.
Experts estimate there could be as many as 3.3 million lost pensions in the UK, with a future pensions dashboard expected to simplify tracking them.