Under an open-perils dwelling form, the burden of proof at claim time works this way:

Giải thích

Open perils covers direct physical loss unless the cause is excluded, so the insured shows a loss occurred and the burden shifts to the insurer to identify the exclusion it relies on. The answer that makes the insured prove the peril is on a list states the named-perils rule, which is how contents are handled on an HO-3.