The Pension Protection Fund (PPF), which provides compensation when companies go bust and are unable to pay staff pensions, has put a three-year brief worth £200,000 up for grabs.
A tender document seen by PRWeek states that the fund is seeking a "strong, long-term partnership in which added value and innovative ideas are as important as successful delivery of the core day-to-day tasks".
It is thought that positioning the organisation as a credible and professional voice in the market will be key to comms brief.
Prompted by the rapid growth of the fund, the tender has progressed beyond PQQ stage with a number of agencies shortlisted.
Claims by pension schemes on the PPF dropped from £1bn down to £619m last year, but an investments portfolio now worth £16.4bn is expected to grow to between £60bn and £80bn by 2030.
A spokesman for the PPF, which was launched in 2005, confirmed that the tender was taking place.