All expenses incurred as a result of the loss need to be explainable, tracked, and supported. Simple summaries and general ledger account details are not enough to get reimbursements from an insurance company. You need receipts, financial records, and full documentation. If applicable, take photos to substantiate your claims.
Maintain a written record of all communication with the insurance adjuster and the vendors they engage. If you get a verbal update from an insurer's representative, make sure you follow up to get them to confirm what was said in writing.
Important: If the disruption occurred at a physical business location, do not tamper with anything, including moving or removing valuables until everything is documented. Consider locking down the site and keeping track of all personnel that has access to the premises.