The phrase "cash sum" refers to a specific amount of money that is paid in the form of physical currency or through an immediate electronic transfer. Full definition
The rider enables the insured to get a guaranteed cash sum if they are diagnosed with any of the critical illnesses. (policybazaar.com)
They will then attend and perform a comprehensive evaluation of the space, before making an offer in the form of a direct cash sum. (creatingapassiveincome.com)
Your premiums and cash sum amount will stay the same unless you decide to alter your payments. (answers.com)