The Prudential is currently in the process of reviewing 300,000 mortgage endowment policies to ensure customers are on track to repay their loans.
The life office is currently unsure how many of its customers are facing a potential shortfall. But the Pru says once it has established this figure it will to write to those clients offering them a number of options to make up the shortfall.
It is believed these options will provide the investor with the choice of either increasing their premiums or transferring to another repayment method.
Pru's senior press officer Kevin Russell says: "We welcome the Association of British Insurers initiative and the FSA's campaign to allay consumer concern over endowments and the review is an exercise to allay those fears."