Today I want to write briefly on a relatively unknown rule. Due to huge number of people who are not able to meet the CPF Minimum Sum, as a concession, married couples aged 55 and above can jointly set aside 1 1/2 times the Minimum Sum required. However, they need to nominate each other as the beneficiary for the balance of their Minimum Sums. What many people do not know is that such a nomination is irrevocable. Moreover, this nomination is different from CPF Nomination. So how this CPF Minimum Sum nomination works?