The Cabinet Office has named Legal & General as the preferred provider for the civil service's defined contribution (DC) scheme.
The Treasury has spent more than £2.6m on administering the Equitable Life payments scheme (ELPS) in the three months to November, government figures have shown.
The Treasury will launch an Equitable Life Payment Scheme advertising campaign to encourage outstanding payment recipients to come forward.
HM Treasury (HMT) has provided an "unacceptably poor" service to Equitable Life policyholders, the Public Accounts Committee (PAC) has said.
The Treasury has claimed that the Equitable Life payments scheme is on track to close on schedule in 2014, despite claims it has been hit by delays and mistakes.