An increase in risk means that, between the time an insurance contract is taken out and the actual start date of the contract, the → Risk one → In the event of a claim increases. If the insured party fails to notify the insurer of the increase in risk, the insurer may, in the → Claim reduce or withhold benefits.

Source reference: See the VDT publication “VDT Article Series, Part 5 | Glossary“ and the source cited there.