Misstatement of Age
When an insurance company is given the wrong age for the insured person(s) it is referred to as misstatement of age.
This is a concern for insurance companies because insurance product pricing relies heavily on age.
Depending on the nature/circumstance of the misstatement the insurance company may choose to cancel the coverage when an incorrect age is given.
More often however, there will be an adjustment the coverage or premiums to account for the correction of age.