It is best that an accident report be completed at the time of the incident. The accident report should specify what happened, who witnessed both the accident as well as the condition that caused the fall, along with any other important information such as the lighting conditions. The requirement for report is generally a question of store or business policy rather than something that’s mandated by the law.
If a report is not completed at the business location or the fall occurred at a private location or was not observed by others, you should compile a record of what happened yourself, including as much information as possible describing the circumstances of the fall, who was present, and any comments made by anyone who saw or helped you after the fall. If it is possible, photos of the area should be taken as soon as possible.