The type and extent of documentation and preservation of fire evidence depends on the nature and severity of the incident, as well as legal and organizational requirements. Generally, it is important to document the scene of the incident as soon as possible using photographs, videos, sketches, notes, and maps. This should include details of the fire damage, ignition sources, fuel, ventilation, and any signs of tampering or arson. Additionally, physical evidence that can indicate the cause and mechanism of the fire should be preserved in appropriate containers with labels and seals to protect it from contamination. Witnesses should also be documented with interviews, questionnaires, or forms to record their observations, opinions, and actions. Furthermore, actions taken to control and extinguish the fire should be documented in logs or reports with information on time duration, effectiveness of response, resources used, equipment deployed, and personnel involved. Finally, injuries, fatalities, and property losses caused by the fire must be documented with medical records, death certificates or invoices that include nature, extent and cost of harm as well as treatment, compensation and recovery measures.