Period allowed an insured to notify an insurer of loss. Many policies require immediate written notice, or notice as soon as practicable. Different types of policies have their own time periods. For example, health insurance policies require notice within 20 days, windstorm insurance policies within 10 days, and hail insurance policies within 48 hours. The purpose of a time period is to allow the insurer to investigate the loss and protect the property from further damage.