Dents and scratch repair

Hello just would like to ask your advise. I was reversing to park and hit the right side of the car parked next to me. How would i know if the scartches was caused by myself as my car looks fine with just very minimal scratch and howuch will it cost to repair

Just own up and pay.

^This. You hit it. If I overjudged my park and kissed the car in front at 1mph; causing their paint to slightly scuff against my grill; regardless of the fact there'd probably be no noticeable damage to my car, I still hit it. I wouldn't be questioning "was that there before?" at that point; because if you have to ask - the answer is no. If you ask the owner; their answer will 99.9% of the time also be a no even if it was. Pay up and be more careful.

If we ever bump into each other. I imagine it would be a hassle free pleasure.

I'd say "I'll keep my information ready in the glove box" but you'll probably forget all about this little exchange and scream "crash for cash!" when I come charging at you with a bit of paper with my pre-written info