An accident report should be best completed right after the incident. Noting all the relevant information such as the witnesses of the accident, the conditions that caused the fall along with other relevant information such as diagnosis of the physician, photos of your injuries and the area where the accident happens.
If a report is not completed at the business location or there are no witnesses where the fall happens, you should record or make a note detailing the incident and all the other relevant information that would help you in your claim.