Fault in a parking lot is frequently split
Two vehicles reversing, unmarked lanes and no right of way established by signage produce shared-fault findings far more often than road collisions do. A split determination means your own collision cover does much of the work, and your deductible applies even when you feel the other driver was more at fault.
Hit and run in a lot is a comprehensive question
Returning to a damaged car with nobody present is handled differently by different carriers: sometimes collision with a deductible, sometimes uninsured motorist property damage. Which applies, and whether a police report is required, is worth knowing before it happens.
These are the claims not worth making
A scraped bumper against a five hundred or thousand dollar deductible usually should not be claimed. Knowing that in advance, and setting the deductible with it in mind, is more useful than any endorsement.