What Is a Proof of Loss and When Is the Deadline in New York?

A proof of loss is a formal, sworn document — usually notarized — in which you state the date and cause of the loss, every item damaged, and the amount you're claiming. It's your official number. Once submitted, it frames the entire negotiation, and in most policies you can't recover more than what you swore to without reopening the document.

Critically, the estimate the insurance company's adjuster writes is not your proof of loss. Many homeowners assume the claim is 'handled' because the company adjuster visited — then get a denial months later for failing to submit the sworn form. The obligation is yours, not theirs.

Under New York Insurance Law § 3404 (the standard fire policy), you must submit the proof of loss within 60 days after the insurer demands it. Many policies echo the same 60-day window from the date of loss or from the insurer's request. Some commercial and flood policies differ — NFIP flood claims have their own strict 60-day deadline from the date of loss.

If you can't make the deadline, request an extension in writing before it expires and keep the insurer's written agreement. An informal verbal extension from an adjuster will not protect you.

The proof of loss forces you to commit to values before you may know the full scope — hidden water damage, smoke migration, code upgrade costs. Swear too low and you've capped your recovery. Swear too high without documentation and you've handed the insurer a fraud argument.

A licensed public adjuster prepares the proof of loss from a complete, documented scope at real Long Island contractor pricing, files it on time, and preserves your right to supplement it if more damage appears. This one document is where claims are won or lost.