A claim is the moment the insurance either works or does not, and how it is handled in the first few days has a great deal to do with which.
Notify immediately
Most policies require notification within a set period, and late notification is a legitimate ground for declining. Report it even if you are not sure it will become a claim, and even if you are still assessing the damage.
Where a crime is involved, obtain a case number. Insurers will ask for it, and getting one weeks later is considerably harder than on the day.
Photograph everything before you tidy up
The instinct after a break-in or a flood is to clear up and get trading again. Do the recording first: wide shots and close ones, the point of entry, the damage, the serial numbers of what is left.
Where you must make emergency repairs to prevent further damage — and most policies require you to — photograph the state beforehand and keep the receipts. Those costs are frequently recoverable.
Do not throw damaged items away
The assessor may want to see them. Disposing of the evidence before it has been inspected is a common reason a claim is reduced.
Assemble the proof
What was lost, what it was worth, and that you owned it. Invoices, photographs, the asset register, stock records, bank statements.
This is where businesses that keep records get paid and businesses that do not, argue. If you have ever wondered why an asset register is worth maintaining, this is the reason and it arrives all at once.
Be accurate
Claim what you lost. Not less out of nervousness, and certainly not more.
Overstating a claim, even slightly, risks the whole thing — most policies allow an insurer to void a claim tainted by misrepresentation, not merely to reduce it. A genuine loss can be lost entirely that way.
Keep one thread
One person handling the claim, one file, everything in writing. Note who you spoke to and when.
Claims involve several parties — broker, insurer, assessor, sometimes contractors — and the most common source of delay is information given to one and not the others.
If it is declined
Ask for the reason in writing, with the clause relied on. Frequently it is a factual misunderstanding that can be corrected with evidence you already have.
If you disagree with the outcome, insurers have internal dispute processes, and there is an industry ombud scheme for consumers and small businesses that is free to use. Take that route before considering legal action; it resolves a great many disputes at no cost.
Then read the policy again
A claim teaches you what your cover actually is. Whatever you discovered — a limit that was too low, an exclusion you had not noticed, an indemnity period that was too short — fix it at renewal while it is still vivid.
General guidance, not insurance or legal advice. Policy conditions and notification periods vary; check your own wording.