My car was hit by a van, How to deal with "arreglo"

Hi Tsikot users,

My car was hit by a van in the parking lot. The owner is open to make "arreglo". How to deal with it? Should I insist to have my car fix in the casa or can I just go to any other auto detailing shop? Should he be present while fixing my car or can I just show him the receipt?

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