In case of a claim for any amount either small or large you undertake the percentage of the damage as co-insurer. If building’s value for example is €200.000, you insure it for €100.000 and you suffer a damage of €50.000 you will be reimbursed for €25.000. You will be liable for 50% of any possible damage. In other words underinsurance means partial insurance and partial insurance means partial reimbursement.