One principle of effective conflict resolution is to always control the situation until it is resolved.
A selfie (or video) with the other driver receiving the money may prevent the altering of a story after the conflict has been resolved by money.
DISCLAMER
I am not advising anyone to engage in any activity that would be consider contra to the laws that would apply to the situation.
Another great reason to have dash cams. I have them in all of my vehicles. Every little bit helps.